var xmlHttp

function check_user_firstname(str) { 
	xmlHttp=GetXmlHttpObject()
	if (xmlHttp==null) {
		alert ("Browser does not support HTTP Request")
		return
	}
	var url="xomol/includes/ajax/check_user_firstname.php"
	url=url+"?user_firstname="+str
	url=url+"&sid="+Math.random()
	xmlHttp.onreadystatechange=user_firstnameChanged 
	xmlHttp.open("GET",url,true)
	xmlHttp.send(null)
}

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

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;
}