// Ham ajax
	function createXMLHttp() {
			
		if (typeof XMLHttpRequest != "undefined") {
			return new XMLHttpRequest(); //Mozilla Firefox, Safari, and Opera…
		} 
		else if (window.ActiveXObject) {
		
			var aVersions = [ "MSXML2.XMLHttp.5.0", "MSXML2.XMLHttp.4.0", "MSXML2.XMLHttp.3.0","MSXML2.XMLHttp", "Microsoft.XMLHttp"];
			for (var i = 0; i < aVersions.length; i++) {
	
				try {
					var oXmlHttp = new ActiveXObject(aVersions[i]);
					return oXmlHttp;
				} catch (oError) {
					//Do nothing
				}
			 }
		}//end else
			throw new Error("XMLHttp object could be created.");
	}
		
	var xmlHttp = createXMLHttp();  
	
	function checkDataByAjax( url,queryString,idName ){	 
	    
		url = url + "?" + queryString;   
		if (xmlHttp == null){
			alert ("Browser does not support HTTP Request");
			return;
 		}
		 
		xmlHttp.open( "POST", url );
		xmlHttp.onreadystatechange = function (){
				 
			//if(xmlHttp.readyState == 1){			 
				//document.getElementById(idName).innerHTML = '<div align="center">Loading ...</div>';
		//	}
			
			if(xmlHttp.readyState == 4){
				var data = xmlHttp.responseText;
					document.getElementById(idName).innerHTML = data;		
			}
			 
		}
		 
		xmlHttp.send( null );
		
	}