// ============================================================

function toggleBox(szDivID, iState) // 1 visible, 0 hidden
{
    if(document.layers)	   //NN4+
    {
	   if(iState == 1){
       	document.layers[szDivID].visibility = "show";
		document.layers[szDivID].display = "block";
	   } else {
	   	document.layers[szDivID].visibility = "hide";
		document.layers[szDivID].display = "none";
	   }
    }
    else if(document.getElementById)	  //gecko(NN6) + IE 5+
    {
        var obj = document.getElementById(szDivID);
         if(iState == 1){
			obj.style.visibility = "visible";
			obj.style.display = "block";
		} else {
			obj.style.visibility = "hidden";
			obj.style.display = "none";
		}
    }
    else if(document.all)	// IE 4
    {
         if(iState == 1){
			document.all[szDivID].style.visibility = "visible";
			document.all[szDivID].style.display = "block";
		} else {
			document.all[szDivID].style.visibility = "hidden";
			document.all[szDivID].style.visibility = "none";
		}
    }
}

// ============================================================

function switchContent(hideDiv,showDiv){
	toggleBox(hideDiv,0);
	toggleBox(showDiv,1);
	divTrackingFile = showDiv + '.txt';
	loadXMLDoc(divTrackingFile);
}

// ============================================================

// begin: xmlhttp request code 
// ----------------------------------------
	var xmlhttp
			
	function loadXMLDoc(url)
	{
		xmlhttp=null
		// code for Mozilla, etc.
		if (window.XMLHttpRequest)
		{
			xmlhttp=new XMLHttpRequest()
		}
		// code for IE
		else if (window.ActiveXObject)
		{
			xmlhttp=new ActiveXObject("Microsoft.XMLHTTP")
		}
		if (xmlhttp!=null)
		{
			// xmlhttp.onreadystatechange=state_Change
			xmlhttp.open("GET",url,true)
			xmlhttp.send(null)
		}
		else
		{
			alert("Your browser does not support XMLHTTP.")
		}
	}
// ----------------------------------------
// end: xmlhttp request code