function instant_popup()
{
	if (readCookie('sessionhidepopup') == null)
	{
		var varcontent=document.getElementById('CurPopupContainer');
		xmlHttp=GetXmlHttpObject();
		if (xmlHttp==null)
		{
			alert ("Browser does not support HTTP Request")
			return
		} 
		
		xmlHttp.onreadystatechange=function ()
		{ 
			if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")
			{ 
				var retText = xmlHttp.responseText;			
				if(retText != 'N' && retText != '')
				{
					if(varcontent)
					{
						varcontent.innerHTML = retText;
						hideUserOriPopUp();
						hideUserPopUp();
						showUserPopUp();
					}
					
				}
			}
		}
		xmlHttp.open("GET","/Network/get_instant_message.php?sid="+Math.random(),true);
		xmlHttp.send(null);
	}
}

function hideUserPopUp()
{
	var curuserpopup = document.getElementById('curuserpopup');
	if (curuserpopup != null)
	{
		curuserpopup.style.display="none";
	}
}

function hideUserOriPopUp()
{
	var userpopup = document.getElementById('userpopup');	
	if (userpopup != null)
	{
		userpopup.style.display="none";
	}
}

function showUserPopUp()
{
	var curuserpopup = document.getElementById('curuserpopup');
	if (curuserpopup != null)
	{
		curuserpopup.style.display="block";
	}
}

function positionit(){
	//define universal reference to "staticcontent"
	var curpopobj=document.all? document.all.curuserpopup : document.getElementById('curuserpopup');
	var logpopobj=document.all? document.all.userpopup : document.getElementById('userpopup');
	var swidth= screen.width;
	var sheight= screen.height;
	//define reference to the body object in IE
	var iebody=(document.compatMode && document.compatMode != "BackCompat")? document.documentElement : document.body;
	//define universal dsoc left point
	var dsocleft=document.all? iebody.scrollLeft : pageXOffset;
	//define universal dsoc top point
	var dsoctop=document.all? iebody.scrollTop : pageYOffset;
	if(curpopobj)
	{
		if(swidth == 800)
		{			
			if (document.all||document.getElementById){
			curpopobj.style.left=parseInt(dsocleft)+400+"px";
			curpopobj.style.top=dsoctop+250+"px";
			}
			
		}else if(swidth == 1280 && sheight == 1024)
		{
			if (document.all||document.getElementById){
			curpopobj.style.left=parseInt(dsocleft)+800+"px";
			curpopobj.style.top=dsoctop+600+"px";
			}
		}else 
		{
			if (document.all||document.getElementById){
			curpopobj.style.left=parseInt(dsocleft)+608+"px";
			curpopobj.style.top=dsoctop+425+"px";
			}
		}
	}
	if(logpopobj)
	{	
		if(swidth == 800)
		{
			if (document.all||document.getElementById){
			logpopobj.style.left=parseInt(dsocleft)+400+"px";
			logpopobj.style.top=dsoctop+200+"px";
			}	
			
		}else if(swidth == 1280 && sheight == 1024)
		{
			if (document.all||document.getElementById){
			logpopobj.style.left=parseInt(dsocleft)+850+"px";
			logpopobj.style.top=dsoctop+450+"px";
			}
		}else 
		{
			if (document.all||document.getElementById){
			logpopobj.style.left=parseInt(dsocleft)+608+"px";
			logpopobj.style.top=dsoctop+305+"px";
			}
		}
	}
}
function hideUserPopUpSession()
{
	
		var content=document.getElementById('CurPopupContainer');
		xmlHttp=GetXmlHttpObject();
		if (xmlHttp==null)
		{
			alert ("Browser does not support HTTP Request")
			return
		} 
		
		xmlHttp.onreadystatechange=function ()
		{ 
			if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")
			{ 
				var retText = xmlHttp.responseText;			
				if (retText == "Logout")
				{
					alert('You have been logout from this session. Please login again.');
					eraseCookie('sessionhidepopup');
					hideUserOriPopUp();
					hideUserPopUp();
					window.location.reload();

				}else{
					hideUserOriPopUp();
					hideUserPopUp();
					createCookie('sessionhidepopup','Y','1');
				}
			}
		}
		xmlHttp.open("GET","/Network/set_instant_message.php?sid="+Math.random(),true);
		xmlHttp.send(null);
	
}

function createCookie(name,value,days) 
{
	if (days) 
	{
		var date = new Date();
		date.setTime(date.getTime()+(days*24*60*60*1000));
		var expires = "; expires="+date.toGMTString();
	}
	else var expires = "";
	document.cookie = name+"="+value+expires+"; path=/";
}
function readCookie(name) {
	var nameEQ = name + "=";
	var ca = document.cookie.split(';');
	for(var i=0;i < ca.length;i++) {
		var c = ca[i];
		while (c.charAt(0)==' ') c = c.substring(1,c.length);
		if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
	}
	return null;
}

function eraseCookie(name) {
	createCookie(name,"",-1);
}