var xmlHttp

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

var url="getuser.php"
url=url+"?q="+str
url=url+"&sid="+Math.random()
xmlHttp.onreadystatechange=stateChanged_email
xmlHttp.open("GET",url,true)
xmlHttp.send(null)
clearError_email('erremail');
}

function stateChanged_email() 
{ 
if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")
{ 
document.getElementById("erremail").innerHTML=xmlHttp.responseText 
if(xmlHttp.responseText=="")
{
	
}
else
{
	document.frmpsd.txtemail.focus();
}
} 
} 

function GetXmlHttpObject()
{ 
var objXMLHttp=null
if (window.XMLHttpRequest)
{
objXMLHttp=new XMLHttpRequest()
}
else if (window.ActiveXObject)
{
objXMLHttp=new ActiveXObject("Microsoft.XMLHTTP")
}
return objXMLHttp
}