// favorite.js
var xmlHttp;
function addFav(form){ 
	xmlHttp=GetXmlHttpObject();
	if (xmlHttp==null){
		alert ("Your browser does not support AJAX!");
		return; 
	} 
	var user = form.userID.value;
	var bus = form.businessID.value;
	var url="http://www.upbuzz.com/template/favorite_script.php";
	url=url+"?user="+user;
	url=url+"&bus="+bus;
	url=url+"&func=add";
	xmlHttp.onreadystatechange=stateChanged;
	xmlHttp.open("GET",url,true);
	xmlHttp.send(null);
}	
function stateChanged() { 
	if (xmlHttp.readyState==4)	{ 
		if (xmlHttp.responseText=="1") { 
			document.getElementById("add_fav").src="../template/images/your_fav.gif";
			document.getElementById("add_fav").onclick="";
		}
	}
}	
function GetXmlHttpObject(){
	var xmlHttp=null;
	try{ xmlHttp=new XMLHttpRequest(); }
	catch (e){
		try{xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");}
		catch (e){xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");}
	}
	return xmlHttp;
}