// JavaScript Document 
/*-----------------------------------------------------------
		File: Ajax To check  User Already Exist
			  02-05-08
			  vinay
			  Bottom commented is PHP code 
--------------------------------------------------------------*/
var xmlHttp
var name='';
function aff_username_exist(str)
{ 
//alert(str);
	name=str;
	xmlHttp=GetXmlHttpObject();
	if (xmlHttp==null)
  	{
 	 alert ("Your browser does not support AJAX!");
 	 return;
 	 } 
 
	var url="aff_uname_exist.php";
	url=url+"?uname="+str;
	
	url=url+"&sid="+Math.random();
	xmlHttp.onreadystatechange=stateChanged;
	xmlHttp.open("GET",url,true);
	xmlHttp.send(null);
	
	
}

function stateChanged() 
{ 
	if (xmlHttp.readyState==4)
	{ 
		if(xmlHttp.responseText==1)
		{
		//document.myform.mcb_username.value="";
		alert("Username '"+name+"' already exists, Please insert another username.");
		//document.getElementById("a_email_id").value="";
		document.getElementById("a_username").focus();
		}
	}
}

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;
} 
/*$link = mysql_connect('localhost', 'taylorb', 'St3v3IsC001')  // PHP code for user_exist.php//
or die('Could not connect: ' . mysql_error());
mysql_select_db('webleadsforrealtors_main', $link) or die('Could not select database');


$username=$_GET['user_name'];
//echo $username;
$sql="select mcb_username from users where mcb_username='".$username."'";
	$result = mysql_query($sql);
	$num=mysql_num_rows($result);
	$v=0;
	if($num>0)
	{
	
	 $v=1;
	 echo $v;

	
	}*/