function CheckLoginForm(frm)
{
	var err="";
	if (ValidatorTrim(frm.clslogin_username.value)=="") err+="Username is required field. \n";
	if (ValidatorTrim(frm.clslogin_password.value)=="") err+="Password is required field.";
	if (err!="") 
	{
		alert(err);
		return false;
	}
	else
	{
		frm.clslogin_hdnsubmited.value = 1;
		return true;
	}
}