var check = 1; 
        var funcall = 0;

        function scrollingDetector()
        {

		
            if (navigator.appName == "Microsoft Internet Explorer")
            {
		
                var topP = (document.documentElement.scrollTop)+300;
                var leftP = (screen.width/2) - 400;
                document.getElementById('popup').style.top = topP;
                document.getElementById('popup').style.marginLeft = leftP;
            }
            else
            {
                var topP = (window.pageYOffset)+300;
                var leftP = (screen.clientWidth/2) - 400;
                document.getElementById('popup').style.top = topP;
                document.getElementById('popup').style.marginLeft = leftP;
            }
        }
        function changeinterval()
        {
	        if(check == 1)
            {
                document.getElementById('popup').style.display='block'; 
                check = check +1;
            }
	        setInterval("scrollingDetector()", 1000);
        }   

        function createCookie(name, 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+"="+expires;  
        }

        function readCookie()
        {
            if(document.cookie.indexOf(document.URL) == -1)
            {
                setInterval("changeinterval()", 5000);   
            }  
        }
        

        function doUnload()
        {
            createCookie(name, -1);
        } 
        
        function init()
        {

            readCookie(); 
           document.getElementById('popup').style.display='none';
        }
        
        window.onload = init;
        window.close =  doUnload();