// JavaScript Document
var xmlHttp

function checkavailability()
{ 

xmlHttp=GetXmlHttpObject()
if (xmlHttp==null)
 {
 alert ("Browser does not support HTTP Request")
 return
 }

var url="checkuseravailability.php"
url=url+"?email="+document.getElementById('txtemail').value
url=url+"&sid="+Math.random()
xmlHttp.onreadystatechange=stateChangedcheckavailability 
xmlHttp.open("GET",url,true)
xmlHttp.send(null)
}

function stateChangedcheckavailability() 
{ 
if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")
 { 
 	if(xmlHttp.responseText=="1")
		document.getElementById('divavailability').innerHTML='<div class="green_text"></div> '; 
	else if(xmlHttp.responseText=="0")
	{
		document.getElementById('divavailability').innerHTML='<div class="red_text">"Oops! Already in use.";	</div> '; 
		document.getElementById('txtemail').value="";
	}
	else 
		document.getElementById('divavailability').innerHTML='<div class="red_text">'+xmlHttp.responseText+'</div> '; 	
 /*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;
}