var xmlHttp;
			function GetXmlHttpObject()
			{
				var xmlHttp=null;
				try
				 {
					 // Firefox, Opera 8.0+, Safari
					 xmlHttp=new XMLHttpRequest();
				 }
				catch (e)
				 {
					 //Internet Explorer
					 try
					  {
					 	 xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
					  }
					 catch (e)
					  {
					 	 xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
					  }
				 }
				return xmlHttp;
			}
			
			function countImpression(bid)
			{	
				xmlHttp=GetXmlHttpObject();
				if (xmlHttp==null)
				 {
			 		alert ("Browser does not support HTTP Request");
				 	return;
			 	}
				var url="impressionSave.php";
				url=url+"?bid=" + bid;
				//alert(url);return false;
					xmlHttp.onreadystatechange=function (){
					if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")
					{ 
						var result=parseInt(xmlHttp.responseText);
						
						if(result == 1)	
							return true;
						else
							return false;
					}
				}
				xmlHttp.open("GET",url,true);
				xmlHttp.send(null);	
			}