var xmlHttp;
		
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;
}	

function stateChanged() 
{ 
if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")
 { 
 document.getElementById("txthint").innerHTML=xmlHttp.responseText 
 } 
}
	
function changeStatus(s, t, id)
{ 
	//alert ("aaa");
	xmlHttp=GetXmlHttpObject()
	if (xmlHttp==null)
	{
		 alert ("Browser does not support HTTP Request")
		 return
	}
	var url="status.php"
	url=url+"?s="+s
	url=url+"&t="+t
	url=url+"&id="+id
	url=url+"&sid="+Math.random()
	xmlHttp.onreadystatechange=stateChanged 
	xmlHttp.open("GET",url,true)
	xmlHttp.send(null)
}

function checkUsername(str){
	xmlHttp=GetXmlHttpObject()
	if (xmlHttp==null)
	{
		 alert ("Browser does not support HTTP Request")
		 return
	}
	var url="status.php"
	url=url+"?user="+str
	url=url+"&sid="+Math.random()
	xmlHttp.onreadystatechange=stateChanged 
	xmlHttp.open("GET",url,true)
	xmlHttp.send(null)
}