function getWindowHeight() {
			var windowHeight = 0;
			if (typeof(window.innerHeight) == 'number') {
				windowHeight = window.innerHeight;
			}
			else {
				if (document.documentElement && document.documentElement.clientHeight) {
					windowHeight = document.documentElement.clientHeight;
				}
				else {
					if (document.body && document.body.clientHeight) {
						windowHeight = document.body.clientHeight;
					}
				}
			}
			return windowHeight;
		}
		function setFooter() {
			if (document.getElementById) {
				var windowHeight = getWindowHeight();
				if (windowHeight > 0) {
					var contentHeight = document.getElementById('content').offsetHeight;
					var footerElement = document.getElementById('footer');
					var footerHeight  = footerElement.offsetHeight;
					if (windowHeight - (contentHeight + footerHeight) >= 0) {
						footerElement.style.position = 'absolute';
						footerElement.style.top = (windowHeight - footerHeight) + 'px';
					}
					else {
						footerElement.style.position = 'static';
					}
				}
			}
		}
		window.onload = function() {
			setFooter();
		}
		window.onresize = function() {
			setFooter();
		}
		
		function layer_change(layer)
{	
	i=1;
    while (document.getElementById("tab"+i))
	{
	document.getElementById("tab"+i).style.display='none';
	i++;
	}
	document.getElementById(layer).style.display='block';
}



function show(tab)
{ 
 i=1;
    while (document.getElementById("show"+i))
 {
 document.getElementById("show"+i).style.display='none'; 
 i++;
 }
 document.getElementById(tab).style.display='block';
}


function hide(tab)
{  
 document.getElementById(tab).style.display='none'; 
 }
 
 
 
 
 function showtitle(titlename, evt)
{ 
/*
 i=1;
    while (document.getElementById("Layer"+i))
 {
 document.getElementById("Layer"+i).style.display='none'; 
 i++;
 }
 */
 document.getElementById(titlename).style.display='block';
 if(evt.clientX - document.getElementById("container").offsetLeft > 460)
    document.getElementById(titlename).style.left = "460px";
 else
     document.getElementById(titlename).style.left=(evt.clientX - document.getElementById("container").offsetLeft) + "px";
}


function hidetitle(titlename)
{  
 document.getElementById(titlename).style.display='none'; 
 }
 
 
 
 function toggle(id)
 { 
 act=document.getElementById(id).style.display
 i=1;
    while (document.getElementById("a"+i))
 {
 document.getElementById("a"+i).style.display='none'; 
 i++;
 } 
 if(act == 'block')
  document.getElementById(id).style.display='none'
 else
  document.getElementById(id).style.display='block'
 }