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                	<button type="button" name="b5" id="b5" class="btn btn-sp-blk"><img src="http://securecamp.co/notebooks/images/NoteBook-sign/under-root.png"/></button>
                    <button type="button" name="b5" id="b5" class="btn btn-sp-blk" onclick="open_this_sk('1')">SK</button>
                    <button type="button" name="b5" id="b5" class="btn btn-sp-blk">QK</button>
                </div>
                <div class="col-md-11">
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" onClick="paste_this('superscript')"><img src="http://securecamp.co/notebooks/images/NoteBook-sign/root_1.png"/></button>
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" onClick="paste_this('subscript')"><img src="http://securecamp.co/notebooks/images/NoteBook-sign/root_2.png"/></button>
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" ><img src="http://securecamp.co/notebooks/images/NoteBook-sign/root_3.png"/></button>
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" ><img src="http://securecamp.co/notebooks/images/NoteBook-sign/root_4.png"/></button>
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" ><img src="http://securecamp.co/notebooks/images/NoteBook-sign/root_5.png"/></button>
                    <br />
                    
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" disabled="disabled"><img src="http://securecamp.co/notebooks/images/NoteBook-sign/root_6.png"/></button>
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" disabled="disabled"> </button>
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" disabled="disabled"> </button>
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" disabled="disabled"> </button>
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" disabled="disabled"> </button>
                        
                  	</div>
            	</div>



			<div class="col-md-12 sp-brd" id="sk5" style="display:none;">
            	<div class="col-md-1">
                	<button type="button" name="b5" id="b5" class="btn btn-sp-blk">dy/dx</button>
                    <button type="button" name="b5" id="b5" class="btn btn-sp-blk" onclick="open_this_sk('1')">SK</button>
                    <button type="button" name="b5" id="b5" class="btn btn-sp-blk">QK</button>
                </div>
                <div class="col-md-11">
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" disabled="disabled"><img src="http://securecamp.co/notebooks/images/NoteBook-sign/dy_dx.png"/></button>
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" disabled="disabled"><img src="http://securecamp.co/notebooks/images/NoteBook-sign/dy_dx.png"/></button>
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" disabled="disabled"><img src="http://securecamp.co/notebooks/images/NoteBook-sign/dy_dx.png"/></button>
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" disabled="disabled"><img src="http://securecamp.co/notebooks/images/NoteBook-sign/dy_dx.png"/></button>
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" disabled="disabled"><img src="http://securecamp.co/notebooks/images/NoteBook-sign/dy_dx.png"/></button>
                    <br />
                    
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" disabled="disabled"> </button>
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" disabled="disabled"> </button>
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" disabled="disabled"> </button>
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" disabled="disabled"> </button>
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" disabled="disabled"> </button>
                  </div>
               </div>
               
               
               <div class="col-md-12 sp-brd" id="sk6" style="display:none;">
            	<div class="col-md-1">
                	<button type="button" name="b5" id="b5" class="btn btn-sp-blk">∑</button>
                    <button type="button" name="b5" id="b5" class="btn btn-sp-blk" onclick="open_this_sk('1')">SK</button>
                    <button type="button" name="b5" id="b5" class="btn btn-sp-blk">QK</button>
                </div>
                <div class="col-md-11">
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" disabled="disabled"><img src="http://securecamp.co/notebooks/images/NoteBook-sign/sigma_1.png"/></button>
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" disabled="disabled"><img src="http://securecamp.co/notebooks/images/NoteBook-sign/sigma_2.png"/></button>
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" disabled="disabled"><img src="http://securecamp.co/notebooks/images/NoteBook-sign/sigma_3.png"/></button>
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" disabled="disabled"><img src="http://securecamp.co/notebooks/images/NoteBook-sign/sigma_4.png"/></button>
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" disabled="disabled"><img src="http://securecamp.co/notebooks/images/NoteBook-sign/sigma_5.png"/></button>
                    <br />
                    
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" disabled="disabled"><img src="http://securecamp.co/notebooks/images/NoteBook-sign/sigma_6.png"/></button>
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" disabled="disabled"><img src="http://securecamp.co/notebooks/images/NoteBook-sign/sigma_7.png"/></button>
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" disabled="disabled"><img src="http://securecamp.co/notebooks/images/NoteBook-sign/sigma_8.png"/></button>
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" disabled="disabled"> </button>
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" disabled="disabled"> </button>
                        
                    </div>
            	</div>
                
                
                <div class="col-md-12 sp-brd" id="sk7" style="display:none;">
            	<div class="col-md-1">
                	<button type="button" name="b5" id="b5" class="btn btn-sp-blk">V</button>
                    <button type="button" name="b5" id="b5" class="btn btn-sp-blk" onclick="open_this_sk('1')">SK</button>
                    <button type="button" name="b5" id="b5" class="btn btn-sp-blk">QK</button>
                </div>
                <div class="col-md-11">
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" disabled="disabled"><img src="http://securecamp.co/notebooks/images/NoteBook-sign/v_1.png"/></button>
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" disabled="disabled"><img src="http://securecamp.co/notebooks/images/NoteBook-sign/v_2.png"/></button>
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" disabled="disabled"><img src="http://securecamp.co/notebooks/images/NoteBook-sign/v_3.png"/></button>
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" disabled="disabled"><img src="http://securecamp.co/notebooks/images/NoteBook-sign/v_4.png"/></button>
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" disabled="disabled"><img src="http://securecamp.co/notebooks/images/NoteBook-sign/v_5.png"/></button>
                    <br />
                    
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" disabled="disabled"><img src="http://securecamp.co/notebooks/images/NoteBook-sign/v_6.png"/></button>
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" disabled="disabled"><img src="http://securecamp.co/notebooks/images/NoteBook-sign/v_7.png"/></button>
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" disabled="disabled"><img src="http://securecamp.co/notebooks/images/NoteBook-sign/v_8.png"/></button>
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" disabled="disabled"><img src="http://securecamp.co/notebooks/images/NoteBook-sign/v_9.png"/></button>
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" disabled="disabled"><img src="http://securecamp.co/notebooks/images/NoteBook-sign/v_10.png"/></button>
                        
                    </div>
            	</div>
                
                
                <div class="col-md-12 sp-brd" id="sk8" style="display:none;">
            	<div class="col-md-1">
                	<button type="button" name="b5" id="b5" class="btn btn-sp-blk">∫</button>
                    <button type="button" name="b5" id="b5" class="btn btn-sp-blk" onclick="open_this_sk('1')">SK</button>
                    <button type="button" name="b5" id="b5" class="btn btn-sp-blk">QK</button>
                </div>
                <div class="col-md-11">
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" disabled="disabled"><img src="http://securecamp.co/notebooks/images/NoteBook-sign/limit_1.png"/></button>
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" disabled="disabled"><img src="http://securecamp.co/notebooks/images/NoteBook-sign/limit_2.png"/></button>
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" disabled="disabled"><img src="http://securecamp.co/notebooks/images/NoteBook-sign/limit_3.png"/></button>
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" disabled="disabled"> </button>
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" disabled="disabled"> </button>
                    <br />
                    
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" disabled="disabled"><img src="http://securecamp.co/notebooks/images/NoteBook-sign/limit_4.png"/></button>
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" onclick="open_this_sk('11')"><img src="http://securecamp.co/notebooks/images/NoteBook-sign/limit_5.png"/></button>
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" onclick="open_this_sk('12')"><img src="http://securecamp.co/notebooks/images/NoteBook-sign/limit_6.png"/></button>
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" disabled="disabled"> </button>
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" disabled="disabled"> </button>
                        
                    </div>
            </div>
            
            
            <div class="col-md-12 sp-brd" id="sk9" style="display:none;">
            	<div class="col-md-1">
                	<button type="button" name="b5" id="b5" class="btn btn-sp-blk">[{()}]</button>
                    <button type="button" name="b5" id="b5" class="btn btn-sp-blk" onclick="open_this_sk('1')">SK</button>
                    <button type="button" name="b5" id="b5" class="btn btn-sp-blk">QK</button>
                </div>
                <div class="col-md-11">
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" disabled="disabled"><img src="http://securecamp.co/notebooks/images/NoteBook-sign/bracket_1.png"/></button>
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" disabled="disabled"><img src="http://securecamp.co/notebooks/images/NoteBook-sign/bracket_2.png"/></button>
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" disabled="disabled"><img src="http://securecamp.co/notebooks/images/NoteBook-sign/bracket_3.png"/></button>
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" disabled="disabled"><img src="http://securecamp.co/notebooks/images/NoteBook-sign/bracket_4.png"/></button>
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" disabled="disabled"> </button>
                    <br />
                    
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" disabled="disabled"><img src="http://securecamp.co/notebooks/images/NoteBook-sign/bracket_5.png"/></button>
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" disabled="disabled"><img src="http://securecamp.co/notebooks/images/NoteBook-sign/bracket_6.png"/></button>
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" disabled="disabled"><img src="http://securecamp.co/notebooks/images/NoteBook-sign/bracket_7.png"/></button>
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" disabled="disabled"><img src="http://securecamp.co/notebooks/images/NoteBook-sign/bracket_8.png"/></button>
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" disabled="disabled"> </button>
                        
                   </div>
            </div>
            
            
            
            <div class="col-md-12 sp-brd" id="sk10" style="display:none;">
            	<div class="col-md-1">
                	<button type="button" name="b5" id="b5" class="btn btn-sp-blk">[{()}]</button>
                    <button type="button" name="b5" id="b5" class="btn btn-sp-blk" onclick="open_this_sk('1')">SK</button>
                    <button type="button" name="b5" id="b5" class="btn btn-sp-blk">QK</button>
                </div>
                <div class="col-md-11">
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" disabled="disabled"><img src="http://securecamp.co/notebooks/images/NoteBook-sign/curly_bracket_1.png"/></button>
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" disabled="disabled"><img src="http://securecamp.co/notebooks/images/NoteBook-sign/curly_bracket_2.png"/></button>
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" disabled="disabled"><img src="http://securecamp.co/notebooks/images/NoteBook-sign/curly_bracket_3.png"/></button>
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" disabled="disabled"><img src="http://securecamp.co/notebooks/images/NoteBook-sign/curly_bracket_4.png"/></button>
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" disabled="disabled"> </button>
                    <br />
                    
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" disabled="disabled"><img src="http://securecamp.co/notebooks/images/NoteBook-sign/curly_bracket_5.png"/></button>
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" disabled="disabled"><img src="http://securecamp.co/notebooks/images/NoteBook-sign/curly_bracket_6.png"/></button>
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" disabled="disabled"><img src="http://securecamp.co/notebooks/images/NoteBook-sign/curly_bracket_7.png"/></button>
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" disabled="disabled"> </button>
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" disabled="disabled"> </button>
                        
                    </div>
            </div>
            
            
            
            <div class="col-md-12 sp-brd" id="sk11" style="display:none;">
            	<div class="col-md-1">
                	<button type="button" name="b5" id="b5" class="btn btn-sp-blk">∫∫</button>
                    <button type="button" name="b5" id="b5" class="btn btn-sp-blk" onclick="open_this_sk('1')">SK</button>
                    <button type="button" name="b5" id="b5" class="btn btn-sp-blk">QK</button>
                </div>
                <div class="col-md-11">
                <div style="width:6%;float:left;"> <button type="button"  onclick="open_this_sk('8')" name="b5" id="b5" class="btn btn-nxt-pre"><</button></div>
                	<div style="width:90%; float:left;">
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" disabled="disabled"><img src="http://securecamp.co/notebooks/images/NoteBook-sign/double_limit_1.png"/></button>
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" disabled="disabled"><img src="http://securecamp.co/notebooks/images/NoteBook-sign/double_limit_2.png"/></button>
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" disabled="disabled"><img src="http://securecamp.co/notebooks/images/NoteBook-sign/double_limit_3.png"/></button>
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" disabled="disabled"> </button>
                    <br />
                    
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" disabled="disabled"><img src="http://securecamp.co/notebooks/images/NoteBook-sign/double_limit_4.png"/></button>
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" disabled="disabled"><img src="http://securecamp.co/notebooks/images/NoteBook-sign/double_limit_5.png"/></button>
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" disabled="disabled"><img src="http://securecamp.co/notebooks/images/NoteBook-sign/double_limit_6.png"/></button>
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" disabled="disabled"> </button>
                        
                    </div>
                    <div style="width:3%;float:left;"> <button type="button" onclick="open_this_sk('12')" name="b5" id="b5" class="btn btn-nxt-pre">></button>
                    </div>
                  </div>
            </div>
            
            
            
            <div class="col-md-12 sp-brd" id="sk12" style="display:none;">
            	<div class="col-md-1">
                	<button type="button" name="b5" id="b5" class="btn btn-sp-blk">∫∫∫</button>
                    <button type="button" name="b5" id="b5" class="btn btn-sp-blk" onclick="open_this_sk('1')">SK</button>
                    <button type="button" name="b5" id="b5" class="btn btn-sp-blk">QK</button>
                </div>
                <div class="col-md-11">
                <div style="width:6%;float:left;"> <button type="button"  onclick="open_this_sk('11')" name="b5" id="b5" class="btn btn-nxt-pre"><</button></div>
                	<div style="width:90%; float:left;">
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" disabled="disabled"><img src="http://securecamp.co/notebooks/images/NoteBook-sign/triple_limit_1.png"/></button>
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" disabled="disabled"><img src="http://securecamp.co/notebooks/images/NoteBook-sign/triple_limit_2.png"/></button>
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" disabled="disabled"><img src="http://securecamp.co/notebooks/images/NoteBook-sign/triple_limit_2.png"/></button>
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" disabled="disabled"> </button>
                    <br />
                    
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" disabled="disabled"><img src="http://securecamp.co/notebooks/images/NoteBook-sign/triple_limit_4.png"/></button>
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" disabled="disabled"><img src="http://securecamp.co/notebooks/images/NoteBook-sign/triple_limit_5.png"/></button>
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" disabled="disabled"><img src="http://securecamp.co/notebooks/images/NoteBook-sign/triple_limit_6.png"/></button>
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" disabled="disabled"> </button>
                        
                    </div>
                    <div style="width:3%;float:left;"> <button type="button" name="b5" id="b5" class="btn btn-nxt-pre" disabled="disabled">></button>
                    </div>
                  </div>
            </div>
            
            
            
            
            <div class="col-md-12 sp-brd" id="sk13" style="display:none;">
            	<div class="col-md-1">
                	<button type="button" name="b5" id="b5" class="btn btn-sp-blk">+=</button>
                    <button type="button" name="b5" id="b5" class="btn btn-sp-blk" onclick="open_this_sk('1')">SK</button>
                    <button type="button" name="b5" id="b5" class="btn btn-sp-blk">QK</button>
                </div>
                <div class="col-md-11">
                
                	
                        <button type="button" onclick="paste_this('+=')" name="b5" id="b5" class="btn btn-primary btn-sk-sub">+=</button>
                        <button type="button" onclick="paste_this('x=')" name="b5" id="b5" class="btn btn-primary btn-sk-sub">x=</button>
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" disabled="disabled"> </button>
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" disabled="disabled"> </button>
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" disabled="disabled"> </button>
                    <br />
                    
                        <button type="button" onclick="paste_this('-=')" name="b5" id="b5" class="btn btn-primary btn-sk-sub">-=</button>
                        <button type="button" onclick="paste_this('%=')" name="b5" id="b5" class="btn btn-primary btn-sk-sub">%=</button>
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" disabled="disabled"> </button>
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" disabled="disabled"> </button>
                        <button type="button" name="b5" id="b5" class="btn btn-primary btn-sk-sub" disabled="disabled"> </button>
                        

                  </div>
            </div></div><div class="col-md-6 ">            <div class="row">
    <div class="col-md-12"><label>Special Symbols Keyboard</label></div>
</div>
<div class="col-md-12 sp-brd">
	<div class="col-md-1">
        <button type="button" name="b5" id="b5" class="btn btn-sp-blk">SYM</button>
        <button type="button" name="b5" id="b5" class="btn btn-sp-blk">SK</button>
        <button type="button" name="b5" id="b5" class="btn btn-sp-blk">QK</button>
    </div>
    <div class="col-md-11"  id="ss1">
    	<div style="width:6%;float:left;"> <button type="button" disabled="disabled" name="b5" id="b5" class="btn btn-nxt-pre"><</button></div>
        <div style="width:92%; float:left;">
             <button type="button" onclick="paste_this('1')" name="b5" id="b5" class="btn btn-primary btn-sp">1</button>
             <button type="button" onclick="paste_this('2')" name="b5" id="b5" class="btn btn-primary btn-sp">2</button>
             <button type="button" onclick="paste_this('3')" name="b5" id="b5" class="btn btn-primary btn-sp">3</button>
             <button type="button" onclick="paste_this('4')" name="b5" id="b5" class="btn btn-primary btn-sp">4</button>
             <button type="button" onclick="paste_this('5')" name="b5" id="b5" class="btn btn-primary btn-sp">5</button>
             <button type="button" onclick="paste_this('6')" name="b5" id="b5" class="btn btn-primary btn-sp">6</button>
             <button type="button" onclick="paste_this('7')" name="b5" id="b5" class="btn btn-primary btn-sp">7</button>
             <button type="button" onclick="paste_this('8')" name="b5" id="b5" class="btn btn-primary btn-sp">8</button>
             <button type="button" onclick="paste_this('9')" name="b5" id="b5" class="btn btn-primary btn-sp">9</button> 
             <button type="button" onclick="paste_this('0')" name="b1" id="b1" class="btn btn-primary btn-sp">0</button><br />
                    
             <button type="button" onclick="paste_this('!')" name="b3" id="b3" class="btn btn-primary btn-sp">!</button>               
             <button type="button" onclick="paste_this('@')" name="b5" id="b5" class="btn btn-primary btn-sp">@</button>
             <button type="button" onclick="paste_this('#')" name="b5" id="b5" class="btn btn-primary btn-sp">#</button>
             <button type="button" onclick="paste_this('$')" name="b5" id="b5" class="btn btn-primary btn-sp">$</button>
             <button type="button" onclick="paste_this('/')" name="b5" id="b5" class="btn btn-primary btn-sp">/</button>
             <button type="button" onclick="paste_this('^')" name="b5" id="b5" class="btn btn-primary btn-sp">^</button>
             <button type="button" onclick="paste_this('&')" name="b5" id="b5" class="btn btn-primary btn-sp">& </button>
             <button type="button" onclick="paste_this('*')" name="b5" id="b5" class="btn btn-primary btn-sp">*</button>
             <button type="button" onclick="paste_this('=')" name="b5" id="b5" class="btn btn-primary btn-sp">=</button>
             <button type="button" onclick="paste_this('<=')" name="b5" id="b5" class="btn btn-primary btn-sp"><=</button>
          </div>
          <div style="width:2%;float:left;"> <button type="button" onclick="open_this('2')" name="b5" id="b5" class="btn btn-nxt-pre">></button>
          </div>
    </div>
    <div class="col-md-11" id="ss2" style="display:none;">
        <div style="width:6%;float:left;"> <button type="button"  onclick="open_this('1')" name="b5" id="b5" class="btn btn-nxt-pre"><</button></div>
        <div style="width:92%; float:left;">
             <button type="button" onclick="paste_this('(')" name="b5" id="b5" class="btn btn-primary btn-sp">(</button>
             <button type="button" onclick="paste_this(')')" name="b5" id="b5" class="btn btn-primary btn-sp">)</button>
             <button type="button" onclick="paste_this(''')" name="b5" id="b5" class="btn btn-primary btn-sp">'</button>
             <button type="button" onclick="paste_this('''')" name="b5" id="b5" class="btn btn-primary btn-sp">"</button>
             <button type="button" onclick="paste_this(':')" name="b5" id="b5" class="btn btn-primary btn-sp">:</button>
             <button type="button" onclick="paste_this(';')" name="b5" id="b5" class="btn btn-primary btn-sp">;</button>
             <button type="button" onclick="paste_this(',')" name="b5" id="b5" class="btn btn-primary btn-sp">,</button>
             <button type="button" onclick="paste_this('-')" name="b5" id="b5" class="btn btn-primary btn-sp">-</button>
             <button type="button" onclick="paste_this('+')" name="b5" id="b5" class="btn btn-primary btn-sp">+</button> 
             <button type="button" onclick="paste_this('÷')" name="b1" id="b1" class="btn btn-primary btn-sp">÷</button><br />
                    
             <button type="button" onclick="paste_this('≠')" name="b3" id="b3" class="btn btn-primary btn-sp">≠</button>               
             <button type="button" onclick="paste_this('<')" name="b5" id="b5" class="btn btn-primary btn-sp"><</button>
             <button type="button" onclick="paste_this('>')" name="b5" id="b5" class="btn btn-primary btn-sp">></button>
             <button type="button" onclick="paste_this('<<')" name="b5" id="b5" class="btn btn-primary btn-sp"><<</button>
             <button type="button" onclick="paste_this('>>')" name="b5" id="b5" class="btn btn-primary btn-sp">>></button>
             <button type="button" onclick="paste_this('≤')" name="b5" id="b5" class="btn btn-primary btn-sp">≤</button>
             <button type="button" onclick="paste_this('≥')" name="b5" id="b5" class="btn btn-primary btn-sp">≥ </button>
             <button type="button" onclick="paste_this('±')" name="b5" id="b5" class="btn btn-primary btn-sp">±</button>
             <button type="button" onclick="paste_this('∓')" name="b5" id="b5" class="btn btn-primary btn-sp">∓</button>
             <button type="button" onclick="paste_this('<=')" name="b5" id="b5" class="btn btn-primary btn-sp"><=</button>
          </div>
          <div style="width:2%;float:left;"> <button type="button" onclick="open_this('3')"name="b5" id="b5" class="btn btn-nxt-pre">></button>
          </div>
    </div>
    <div class="col-md-11" id="ss3" style="display:none;">
        <div style="width:6%;float:left;"> <button type="button"  onclick="open_this('2')" name="b5" id="b5" class="btn btn-nxt-pre"><</button></div>
        <div style="width:92%; float:left;">
             <button type="button" onclick="paste_this('∞')" name="b5" id="b5" class="btn btn-primary btn-sp">∞</button>
             <button type="button" onclick="paste_this('᷈')" name="b5" id="b5" class="btn btn-primary btn-sp">᷈</button>
             <button type="button" onclick="paste_this('x')" name="b5" id="b5" class="btn btn-primary btn-sp">x</button>
             <button type="button" onclick="paste_this('ˠ')" name="b5" id="b5" class="btn btn-primary btn-sp">ˠ</button>
             <button type="button" onclick="paste_this('≈')" name="b5" id="b5" class="btn btn-primary btn-sp">≈</button>
             <button type="button" onclick="paste_this('≈')" name="b5" id="b5" class="btn btn-primary btn-sp">≈</button>
             <button type="button" onclick="paste_this('≡')" name="b5" id="b5" class="btn btn-primary btn-sp">≡</button>
             <button type="button" onclick="paste_this('Ɐ')" name="b5" id="b5" class="btn btn-primary btn-sp">Ɐ</button>
             <button type="button" onclick="paste_this('ʗ')" name="b5" id="b5" class="btn btn-primary btn-sp">ʗ</button> 
             <button type="button" onclick="paste_this('ə')" name="b1" id="b1" class="btn btn-primary btn-sp">ə</button><br />
                    
             <button type="button" onclick="paste_this('√')" name="b3" id="b3" class="btn btn-primary btn-sp">√</button>               
             <button type="button" onclick="paste_this('∑')" name="b5" id="b5" class="btn btn-primary btn-sp">∑</button>
             <button type="button" onclick="paste_this('V')" name="b5" id="b5" class="btn btn-primary btn-sp">V</button>
             <button type="button" onclick="paste_this('U')" name="b5" id="b5" class="btn btn-primary btn-sp">U</button>
             <button type="button" onclick="paste_this('∩')" name="b5" id="b5" class="btn btn-primary btn-sp">∩</button>
             <button type="button" onclick="paste_this('Ø')" name="b5" id="b5" class="btn btn-primary btn-sp">Ø</button>
             <button type="button" onclick="paste_this('%')" name="b5" id="b5" class="btn btn-primary btn-sp">% </button>
             <button type="button" onclick="paste_this('€')" name="b5" id="b5" class="btn btn-primary btn-sp">€</button>
             <button type="button" onclick="paste_this('£')" name="b5" id="b5" class="btn btn-primary btn-sp">£</button>
             <button type="button" onclick="paste_this('<=')" name="b5" id="b5" class="btn btn-primary btn-sp"><=</button>
          </div>
          <div style="width:2%;float:left;"> <button type="button"  onclick="open_this('4')" name="b5" id="b5" class="btn btn-nxt-pre">></button>
          </div>
    </div>
    <div class="col-md-11" id="ss4" style="display:none;">
        <div style="width:6%;float:left;"> <button type="button"  onclick="open_this('3')" name="b5" id="b5" class="btn btn-nxt-pre"><</button></div>
        <div style="width:92%; float:left;">
             <button type="button" onclick="paste_this('°')" name="b5" id="b5" class="btn btn-primary btn-sp">°</button>
             <button type="button" onclick="paste_this('°C')" name="b5" id="b5" class="btn btn-primary btn-sp">°C</button>
             <button type="button" onclick="paste_this('°F')" name="b5" id="b5" class="btn btn-primary btn-sp">°F</button>
             <button type="button" onclick="paste_this('∆')" name="b5" id="b5" class="btn btn-primary btn-sp">∆</button>
             <button type="button" onclick="paste_this('∆')" name="b5" id="b5" class="btn btn-primary btn-sp">∆</button>
             <button type="button" onclick="paste_this('Ǝ')" name="b5" id="b5" class="btn btn-primary btn-sp">Ǝ</button>
             <button type="button" onclick="paste_this('Ɇ')" name="b5" id="b5" class="btn btn-primary btn-sp">Ɇ</button>
             <button type="button" onclick="paste_this('Ɛ')" name="b5" id="b5" class="btn btn-primary btn-sp">Ɛ</button>
             <button type="button" onclick="paste_this('Ȝ')" name="b5" id="b5" class="btn btn-primary btn-sp">Ȝ</button> 
             <button type="button" onclick="paste_this('•')" name="b1" id="b1" class="btn btn-primary btn-sp">•</button><br />
                    
             <button type="button" onclick="paste_this('ֶ')" name="b3" id="b3" class="btn btn-primary btn-sp">ֶ</button>               
             <button type="button" onclick="paste_this('֒')" name="b5" id="b5" class="btn btn-primary btn-sp">֒</button>
             <button type="button" onclick="paste_this('←')" name="b5" id="b5" class="btn btn-primary btn-sp">←</button>
             <button type="button" onclick="paste_this('→')" name="b5" id="b5" class="btn btn-primary btn-sp">→</button>
             <button type="button" onclick="paste_this('↑')" name="b5" id="b5" class="btn btn-primary btn-sp">↑</button>
             <button type="button" onclick="paste_this('↓')" name="b5" id="b5" class="btn btn-primary btn-sp">↓</button>
             <button type="button" onclick="paste_this('↔')" name="b5" id="b5" class="btn btn-primary btn-sp">↔ </button>
             <button type="button" onclick="paste_this('∂')" name="b5" id="b5" class="btn btn-primary btn-sp">∂</button>
             <button type="button" onclick="paste_this('β')" name="b5" id="b5" class="btn btn-primary btn-sp">β</button>
             <button type="button" onclick="paste_this('<=')" name="b5" id="b5" class="btn btn-primary btn-sp"><=</button>
          </div>
          <div style="width:2%;float:left;"> <button type="button" onclick="open_this('5')" name="b5" id="b5" class="btn btn-nxt-pre">></button>
          </div>
    </div>
    <div class="col-md-11" id="ss5" style="display:none;">    
        <div style="width:6%;float:left;"> <button type="button"  onclick="open_this('4')" name="b5" id="b5" class="btn btn-nxt-pre"><</button></div>
        <div style="width:92%; float:left;">
             <button type="button" onclick="paste_this('Ɣ')" name="b5" id="b5" class="btn btn-primary btn-sp">Ɣ</button>
             <button type="button" onclick="paste_this('°Ɛ')" name="b5" id="b5" class="btn btn-primary btn-sp">Ɛ</button>
             <button type="button" onclick="paste_this('°E')" name="b5" id="b5" class="btn btn-primary btn-sp">E</button>
             <button type="button" onclick="paste_this('Ɵ')" name="b5" id="b5" class="btn btn-primary btn-sp">Ɵ</button>
             <button type="button" onclick="paste_this('V')" name="b5" id="b5" class="btn btn-primary btn-sp">V</button>
             <button type="button" onclick="paste_this('µ')" name="b5" id="b5" class="btn btn-primary btn-sp">µ</button>
             <button type="button" onclick="paste_this('π')" name="b5" id="b5" class="btn btn-primary btn-sp">π</button>
             <button type="button" onclick="paste_this('p')" name="b5" id="b5" class="btn btn-primary btn-sp">p</button>
             <button type="button" onclick="paste_this('σ')" name="b5" id="b5" class="btn btn-primary btn-sp">σ</button> 
             <button type="button" onclick="paste_this('Ԏ')" name="b1" id="b1" class="btn btn-primary btn-sp">Ԏ</button><br />
                    
             <button type="button" onclick="paste_this('φ')" name="b3" id="b3" class="btn btn-primary btn-sp">φ</button>               
             <button type="button" onclick="paste_this('w')" name="b5" id="b5" class="btn btn-primary btn-sp">w</button>
             <button type="button" onclick="paste_this('⁞')" name="b5" id="b5" class="btn btn-primary btn-sp">⁞</button>
             <button type="button" onclick="paste_this('…')" name="b5" id="b5" class="btn btn-primary btn-sp">…</button>
             <button type="button" onclick="paste_this('ֻ')" name="b5" id="b5" class="btn btn-primary btn-sp">ֻ</button>
             <button type="button" onclick="paste_this('ֻ')" name="b5" id="b5" class="btn btn-primary btn-sp">ֻ</button>
             <button type="button" onclick="paste_this('ﬡ')" name="b5" id="b5" class="btn btn-primary btn-sp">ﬡ</button>
             <button type="button" onclick="paste_this('בּ')" name="b5" id="b5" class="btn btn-primary btn-sp">בּ</button>
             <button type="button" onclick="paste_this('Ȿ')" name="b5" id="b5" class="btn btn-primary btn-sp">Ȿ</button>
             <button type="button" onclick="paste_this('<=')" name="b5" id="b5" class="btn btn-primary btn-sp"><=</button>
          </div>
          <div style="width:2%;float:left;"> <button type="button" onclick="open_this('6')" name="b5" id="b5" class="btn btn-nxt-pre">></button>
          </div>
    </div>
    <div class="col-md-11" id="ss6" style="display:none;">
    	<div style="width:6%;float:left;"> <button type="button"  onclick="open_this('5')" name="b5" id="b5" class="btn btn-nxt-pre"><</button></div>
        <div style="width:92%; float:left;">
             <button type="button" onclick="paste_this('♥')" name="b5" id="b5" class="btn btn-primary btn-sp">♥</button>
             <button type="button" onclick="paste_this('ꜟ')" name="b5" id="b5" class="btn btn-primary btn-sp">ꜟ</button>
             <button type="button" onclick="paste_this('¿')" name="b5" id="b5" class="btn btn-primary btn-sp">¿</button>
             <button type="button" onclick="paste_this('♀')" name="b5" id="b5" class="btn btn-primary btn-sp">♀</button>
             <button type="button" onclick="paste_this('♣')" name="b5" id="b5" class="btn btn-primary btn-sp">♣</button>
             <button type="button" onclick="paste_this('⃰')" name="b5" id="b5" class="btn btn-primary btn-sp">⃰</button>
             <button type="button" onclick="paste_this('▲')" name="b5" id="b5" class="btn btn-primary btn-sp">▲</button>
             <button type="button" onclick="paste_this('►')" name="b5" id="b5" class="btn btn-primary btn-sp">►</button>
             <button type="button" onclick="paste_this('▼')" name="b5" id="b5" class="btn btn-primary btn-sp">▼</button> 
             <button type="button" onclick="paste_this('◄')" name="b1" id="b1" class="btn btn-primary btn-sp">◄</button><br />
                    
             <button type="button" onclick="paste_this('☺')" name="b3" id="b3" class="btn btn-primary btn-sp">☺</button>               
             <button type="button" onclick="paste_this('☻')" name="b5" id="b5" class="btn btn-primary btn-sp">☻</button>
             <button type="button" onclick="paste_this('☼')" name="b5" id="b5" class="btn btn-primary btn-sp">☼</button>
             <button type="button" onclick="paste_this('♫')" name="b5" id="b5" class="btn btn-primary btn-sp">♫</button>
             <button type="button" onclick="paste_this('﴾')" name="b5" id="b5" class="btn btn-primary btn-sp">﴾</button>
             <button type="button" onclick="paste_this('﴿')" name="b5" id="b5" class="btn btn-primary btn-sp">﴿</button>
             <button type="button" onclick="paste_this('Ѽ')" name="b5" id="b5" class="btn btn-primary btn-sp">Ѽ</button>
             <button type="button" onclick="paste_this('҈')" name="b5" id="b5" class="btn btn-primary btn-sp">҈</button>
             <button type="button" onclick="paste_this('۩')" name="b5" id="b5" class="btn btn-primary btn-sp">۩</button>
             <button type="button" onclick="paste_this('<=')" name="b5" id="b5" class="btn btn-primary btn-sp"><=</button>
          </div>
          <div style="width:2%;float:left;"> <button type="button" disabled="disabled" name="b5" id="b5" class="btn btn-nxt-pre">></button></div>
    </div>
</div></div></div>
                </form>    
				<!------------------------------------------------------Heading Popup model------------------------------------------------>         
                <form method="post" onSubmit="return valid_chead();">
                    <div class="modal fade" id="heading_model" role="dialog">
                        <div class="modal-dialog">
                          <!-- Modal content-->
                            <div class="modal-content">
                                <div class="modal-body">
                                   <div class="row">
                                        <div class="col-md-6">
                                            <div class="form-group">
                                            	<input type="hidden" name="model_content_cid" class="form-control" id="model_content_cid">
                                                <label for="exampleInputEmail1">Heading<span class="red_clr f_bold">*</span></label>
                                                <input type="text" name="model_content_heading" class="form-control" id="model_content_heading">
                                                <div id="content_heading_error" class="text-danger"></div>
                                            </div>
                                        </div>
                                    </div>
                                </div>
                                <div class="modal-footer">
                                    <button type="submit" class="btn btn-primary" id="submit_head" name="submit_head">Submit</button>
                                  	<button type="button" class="btn btn-primary" data-dismiss="modal">Close</button>
                                </div>
                            </div>
                        </div>
                    </div>
                </form>    
                <!------------------------------------------------------Chapter Name Popup model------------------------------------------------>         
                <form method="post" onSubmit="return valid_ctitle();">
                    <div class="modal fade" id="chapter_title_model" role="dialog">
                        <div class="modal-dialog">
                          <!-- Modal content-->
                            <div class="modal-content">
                                <div class="modal-body">
                                   <div class="row">
                                        <div class="col-md-6">
                                            <div class="form-group">
                                            	<input type="hidden" name="model_chid" class="form-control" id="model_chid">
                                                <label for="exampleInputEmail1">Chapter Name<span class="red_clr f_bold">*</span></label>
                                                <input type="text" name="model_chapter_tile" class="form-control" id="model_chapter_tile">
                                                <div id="chapter_name_error" class="text-danger"></div>
                                            </div>
                                        </div>
                                    </div>
                                </div>
                                <div class="modal-footer">
                                    <button type="submit" class="btn btn-primary" id="submit_chTilte" name="submit_chTilte">Submit</button>
                                  	<button type="button" class="btn btn-primary" data-dismiss="modal">Close</button>
                                </div>
                            </div>
                        </div>
                    </div>
                </form> <!------------------------------------------------------Page No. Popup model------------------------------------------------>         
                <form method="post" onSubmit="return valid_ch_page_no();">
                    <div class="modal fade" id="page_no_model" role="dialog">
                        <div class="modal-dialog">
                          <!-- Modal content-->
                            <div class="modal-content">
                                <div class="modal-body">
                                   <div class="row">
                                   		<input type="hidden" name="model_pg_id_no" class="form-control" id="model_pg_id_no">
                                        <input type="hidden" name="model_ch_id_no" class="form-control" id="model_ch_id_no">
                                        <div class="col-md-6">
                                            <div class="form-group">
                                                <label for="exampleInputEmail1">Page No.<span class="red_clr f_bold">*</span></label>
                                                <input type="text" name="model_page_no" class="form-control" id="model_page_no" placeholder="Page No.">
                                                <div id="page_no_error" class="text-danger"></div>
                                            </div>
                                        </div>
                                    </div>
                                </div>
                                <div class="modal-footer">
                                    <button type="submit" class="btn btn-primary" id="submit_page_no" name="submit_page_no">Submit</button>
                                  	<button type="button" class="btn btn-primary" data-dismiss="modal">Close</button>
                                </div>
                            </div>
                        </div>
                    </div>
                </form>    
                 <!------------------------------------------------------ Page Name Popup model------------------------------------------------>         
                <form method="post" onSubmit="return valid_ch_page_name();">
                    <div class="modal fade" id="page_name_model" role="dialog">
                        <div class="modal-dialog">
                          <!-- Modal content-->
                            <div class="modal-content">
                                <div class="modal-body">
                                   <div class="row">
                                   		<input type="hidden" name="model_pg_id_name" class="form-control" id="model_pg_id_name">
                                        <input type="hidden" name="model_ch_id_name" class="form-control" id="model_ch_id_name">
                                         <div class="col-md-6">
                                            <div class="form-group">
                                                <label for="exampleInputEmail1">Page Name<span class="red_clr f_bold">*</span></label>
                                                <input type="text" name="model_page_name" class="form-control" id="model_page_name" placeholder="Page Name">
                                                <div id="page_name_error" class="text-danger"></div>
                                            </div>
                                        </div>
                                    </div>
                                </div>
                                <div class="modal-footer">
                                    <button type="submit" class="btn btn-primary" id="submit_page_name" name="submit_page_name">Submit</button>
                                  	<button type="button" class="btn btn-primary" data-dismiss="modal">Close</button>
                                </div>
                            </div>
                        </div>
                    </div>
                </form>          
                <!------------------------------------------------------Image Popup model------------------------------------------------>         
                <form method="POST" enctype="multipart/form-data">
                    <div class="modal fade" id="image_model" role="dialog">
                        <div class="modal-dialog">
                          <!-- Modal content-->
                            <div class="modal-content">
                                <div class="modal-body">
                                   <div class="row">
                                        <div class="col-md-6">
                                            <div class="form-group">
                                                <input type="file" name="content_image" id="content_image">
                                            </div>
                                        </div>
                                    </div>
                                </div>
                                <div class="modal-footer">
                                    <button type="submit" class="btn btn-primary" id="upload_image" name="upload_image">Submit</button>
                                  	<button type="button" class="btn btn-primary" data-dismiss="modal">Close</button>
                                </div>
                            </div>
                        </div>
                    </div>
                </form>    
            </div>
        </section>
        <!--        <footer>

            <div class="container-fluid">

                <div class="row">

                    <div class="col-md-3">

                        <ul class="social">

                            <li>&nbsp;<a href="#"><img src="images/fb.jpg"></a></li>

                            <li>&nbsp;<a href="#"><img src="images/g-pluus.jpg"></a></li>

                            <li>&nbsp;<a href="#"><img src="images/in.jpg"></a></li>

                            <li>&nbsp;<a href="#"><img src="images/twitter.jpg"></a></li>

                            <li>&nbsp;<a href="#"><img src="images/you-tube.jpg"></a></li>

                        </ul>

                    </div>

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