var xmlHttp
		
	
	function checkDuplicateUsername(id,name)
	{ 	 
		var url="./duplicate_username.php?id="+ id +"&user=" + name ;	
		xmlHttp=GetXmlHttpObject(responseCheckDuplicateName)
		xmlHttp.open("GET", url , true)
		xmlHttp.send(null)
	} 
	
	
	function responseCheckDuplicateName() 
	{  
	 	 	 	 	 	 
		if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")
		{  
		  	if(xmlHttp.responseText == 1)
  			{  
  				 alert('Username Already Exists, Please Try Another !!');  										
  			}
  			else if(xmlHttp.responseText == 0)
  			{
  			  checkDuplicateUseremail('',document.user_register.email.value);
  			}
		} 
	} 
	
	
	
	
	
	
	
	function checkDuplicateUsernameEdit(id, name)
	{ 	 
		var url="./duplicate_username.php?id="+ id +"&user=" + name ;	
		xmlHttp=GetXmlHttpObject(responseCheckDuplicateNameEdit)
		xmlHttp.open("GET", url, true)
		xmlHttp.send(null)
	}
	
function responseCheckDuplicateNameEdit() 
	{  
	 	 	 	 	 	 
		if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")
		{  
		  	if(xmlHttp.responseText == 1)
  			{  
  				 alert('Username Already Exists, Please Try Another !!');  										
  			}
  			else if(xmlHttp.responseText == 0)
  			{
							checkDuplicateUseremailEdit(document.user_profile.userid.value, document.user_profile.email.value);
  			}
		} 
	} 
	
	function GetXmlHttpObject(handler)
	{ 
		var objXmlHttp=null
	
		if (navigator.userAgent.indexOf("Opera")>=0)
		{
			alert("This example 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
			}
	}