function initPage()
{
	var navRoot = document.getElementById("top-nav");
	var lis = navRoot.getElementsByTagName("li");
	for (var i=0; i<lis.length; i++)
	{
		lis[i].onmouseover = function()
		{
			this.className += " hover";
                }
		lis[i].onmouseout = function()
		{
			this.className = this.className.replace(new RegExp("hover"),"");
		}
	}
}

if (window.attachEvent && !window.opera)
	attachEvent("onload", initPage);



function toggleDisplay(div,iframe,objpos,pos)
{
	var t=0;
	var l=0;
	var state=false;

	var cNode = document.getElementById(objpos);
	while(cNode.tagName!='BODY'){ 
       		l+=cNode.offsetLeft; 
       		t+=cNode.offsetTop; 
       		cNode=cNode.offsetParent; 
    	}

	var DivRef = document.getElementById(div);
	var IfrRef = document.getElementById(iframe);
   	var ObjPos = document.getElementById(objpos);

	if (DivRef.style.display=="none") {
		state=true;
	} else {
		state=false;
	}

   	if(state)
   	{
    		DivRef.style.display = "block";
    		IfrRef.style.width = DivRef.offsetWidth;
    		IfrRef.style.height = DivRef.offsetHeight;
	
	switch (pos) {
		case "left": 
    			DivRef.style.top = t;
    			DivRef.style.left = (l-ObjPos.offsetWidth);
    			IfrRef.style.top = t;
    			IfrRef.style.left = (l-ObjPos.offsetWidth);
	  		break;
		case "right": 
			DivRef.style.top = t;
			DivRef.style.left = (l+ObjPos.offsetWidth);
    			IfrRef.style.top = t;
    			IfrRef.style.left = (l+ObjPos.offsetWidth);
	  		break;
		case "bottom": 
			DivRef.style.top = (t+ObjPos.offsetHeight);
    			DivRef.style.left = l;
    			IfrRef.style.top = (t+ObjPos.offsetHeight);
    			IfrRef.style.left = l;
	  		break;
		case "top": 
    			DivRef.style.top = (t-ObjPos.offsetHeight);
    			DivRef.style.left = l;
    			IfrRef.style.top = (t-ObjPos.offsetHeight);
    			IfrRef.style.left = l;
	  		break;
        	}


    	IfrRef.style.zIndex = DivRef.style.zIndex - 1;
    	IfrRef.style.display = "block";
    	IfrRef.style.backgroundColor = "black";
   	}
   	else
   	{
    		DivRef.style.display = "none";
    		IfrRef.style.display = "none";
   	}

}