var xmlHttp


//---------------------------------------Check Userid-------------------------------------------------
//--------------------------------------------------------------------------------------------------------------------

function Checkexpid(str)
{ 
if(str=="" || !str.match(/^[a-zA-Z0-9]+$/) || str.length<=3 || str.length>=21)
{
document.getElementById("idcheck").innerHTML = "<span class='backred'>&nbsp;&nbsp;Please choose a Valid ID</span>";


//alert ("Please Enter ALphnumeric values");
	//form1.username.value="";
	return false;
	

}
else
{

 

var url="ajax_user.php?sid=" + Math.random() + "&q=" + str
xmlHttp=GetXmlHttpObject(idChanged)
xmlHttp.open("GET", url , true)
xmlHttp.send(null)
}
} 

function idChanged() 
{ 
if(xmlHttp.readyState==4 || xmlHttp.readyState=="complete")
{ 

document.getElementById("idcheck1").innerHTML=xmlHttp.responseText 
} 
}

//-------------------------------------------------------------------------------------------------------------------









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
}
}