function Inint_AJAX() {
		   try { return new ActiveXObject("Msxml2.XMLHTTP");  } catch(e) {} //IE
		   try { return new ActiveXObject("Microsoft.XMLHTTP"); } catch(e) {} //IE
		   try { return new XMLHttpRequest();          } catch(e) {} //Native Javascript
		   alert("XMLHttpRequest not supported");
		   return null;
		};

		function dochange(el,src) {
			 var req = Inint_AJAX();
			 req.onreadystatechange = function () { 
				  if (req.readyState==4) {
					   if (req.status==200) {
							document.getElementById(el).innerHTML=req.responseText; //retuen value
					   } 
				  }
			 };
			 req.open("GET", src); 
			 req.setRequestHeader("Content-Type", "application/x-www-form-urlencoded;charset=iso-8859-1"); // set Header
			 req.send(null); 
		}