function initializeAJAXGETRequest(url) {
		if (window.XMLHttpRequest) {
			return new XMLHttpRequest();
		} else if (window.ActiveXObject) {
			isIE = true;
			return new ActiveXObject("Microsoft.XMLHTTP");
		}
	}
	function callajax(url,functionName){
		try{
        var req = initializeAJAXGETRequest(url);
		req.onreadystatechange = function() {
			if (req.readyState == 4){
				if (req.status == 200) {
                    //alert(functionName+"(req.responseText)");
                    if(functionName!=null)
                        eval(functionName+"(req.responseText)");
                } else if (req.status == 204){
					;// The empty case
				}
			}
		};
		req.open("GET", url, true);
		req.send(null);
		}catch(err){
			alert('error in Ajax Call..........');
			//donothing..
  		}
	}