function getE(name)
{
if (document.getElementById)
var elem = document.getElementById(name);
else if (document.all)
var elem = document.all[name];
else if (document.layers)
var elem = document.layers[name];
return elem;
}
function toggleLayer(whichLayer, flag)
{
var style = getE(whichLayer).style;
style.display = (flag == '') ? 'none' : 'block';
}
function openCloseLayer(whichLayer, action)
{
var style = getE(whichLayer).style;
if (!action)
style.display = style.display == 'none' ? 'block' : 'none';
else if (action == 'open')
style.display = 'block';
else if (action == 'close')
style.display = 'none';
}