function login()
{ 
	var username = document.getElementById("username").value;
	var password = document.getElementById("password").value;
	var url="../admin/login.php?username=" + username + "&password=" +  password + "&rand=" + Math.random();
	xmlHttp=GetXmlHttpObject(stateChangedlogin)
	xmlHttp.open("GET", url , true)
	xmlHttp.send(null)
	function stateChangedlogin() 
	{ 
		if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")
		{ 
			document.getElementById("signin").innerHTML=xmlHttp.responseText 
		}
		else
		{
			document.getElementById("signin").innerHTML="please wait."
		} 
	} 

}