var xmlHttp
function checkUser(){
	xmlHttp=GetXmlHttpObject()
	if (xmlHttp==null){
 		alert ("Browser does not support HTTP Request")
 		return
 	} 
	var anvnamn  = document.getElementById('anvnamn').value;
	var url="checkuser.php"
	url=url+"?anvnamn="+escape(anvnamn)
	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("message").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
}