document.domain="gutx.com";
if (top.location != self.location)top.location=self.location;
function userlogin()
{
	if(document.u.username.value=='')
	{
	alert('用户名不能为空');
	document.u. username.focus();
	return false;
	}
	if(document.u. password.value=='')
	{
	alert('密码不能为空');
	document.u. password.focus();
	return false;
	}
	document.u.backurl.value="http://chat.gutx.com/talkonline/talk_detail.htm";
    document.u.submit();

}
function killErrors() 
{ 
	return true; 
} 
window.onerror = killErrors;