var xmlHttp
function stateChangedEmail(){ 
	if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete"){ 
	var receivedResponse;
	receivedResponse = xmlHttp.responseText;
	if( receivedResponse == " : <font color=green> Available</font>"){
		UIDAvailable = 1;
	}else{
		UIDAvailable = 0;
		document.signup.email.focus();

	}
	document.getElementById("EmailStatus").innerHTML=receivedResponse;
	} 
} 
function GetXmlHttpObject(handler){ 
	var objXmlHttp=null
	
	if (navigator.userAgent.indexOf("Opera")>=0){
//		alert("This script doesn't work in Opera") 
		return 
	}
	if (navigator.userAgent.indexOf("MSIE")>=0){ 
		var strName="Msxml2.XMLHTTP"
		if (navigator.appVersion.indexOf("MSIE 5.5")>=0){
			strName="Microsoft.XMLHTTP"
		}try{ 
			objXmlHttp=new ActiveXObject(strName)
			objXmlHttp.onreadystatechange=handler 
			return objXmlHttp
		}catch(e){ 
//			alert("Error. Scripting for ActiveX might be disabled") 
			return 
		} 
} 
	if (navigator.userAgent.indexOf("Mozilla")>=0){
		objXmlHttp=new XMLHttpRequest()
		objXmlHttp.onload=handler
		objXmlHttp.onerror=handler 
		return objXmlHttp
	}
}  


function CheckMemberEmail(){
	if(document.signup.email.value==""){
		alert("Error!\n\nEmail field cannot be empty.")
		ok=0;
		document.signup.email.focus();
		return false;
	}else{
		if (document.signup.email.value.search(/^.+@.+\..+$/)){
			alert("Error!\n\nYou entered an invalid email address.");
			document.signup.email.focus();
			return false;
		}else{
			document.getElementById("EmailStatus").innerHTML="<img border=0 src='http://www.mustakbil.com/images/wait.gif' width=16 height=16>"
			var url="http://"+document.location.host+"/CheckMemberEmail/?email=" + document.signup.email.value
			xmlHttp=GetXmlHttpObject(stateChangedEmail)
			xmlHttp.open("GET", url , true)
			xmlHttp.send(null)
		}
	}

}