var xmlHttp

function findBeers(brewery,label) {
	if (brewery.length==0 && label.length==0) { 
		document.getElementById("beerList").innerHTML=""
		return
		}
	
	xmlHttp=GetXmlHttpObject()
	if (xmlHttp==null) {
	alert ("Browser does not support HTTP Request")
		return
		} 
	var url="find-the-beers.php"
	url=url+"?b="+brewery+"&l="+label
	url=url+"&sid="+Math.random()
	xmlHttp.onreadystatechange=stateChanged 
	xmlHttp.open("GET",url,true)
	xmlHttp.send(null)
	} 

function stateChanged() { 
	if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete") { 
		document.getElementById("beerList").innerHTML=xmlHttp.responseText 
		} 
	} 

function GetXmlHttpObject() { 
	var objXMLHttp=null
	if (window.XMLHttpRequest) {
		objXMLHttp=new XMLHttpRequest()
		}
	else if (window.ActiveXObject) {
		objXMLHttp=new ActiveXObject("Microsoft.XMLHTTP")
		}
	return objXMLHttp
	}