var xmlHttp;

function useAjax(changeurlinfo, pagediv) { 
	xmlHttp=GetXmlHttpObject();
	if (xmlHttp==null) {
 		alert ("Browser does not support HTTP Request");
 		return;
	}
	var url=changeurlinfo + "ajax=1";
	xmlHttp.onreadystatechange=function() {
		if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete") { 
			document.getElementById(pagediv).innerHTML=xmlHttp.responseText;
		}
	}
	//alert(url);
	xmlHttp.open("GET",url,true);
	xmlHttp.send(null);
}

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;
}