function checkForm(lform)
    {
		if (lform.user_name.value=="")
		     {
			alert("Please enter user name");
			lform.user_name.focus();
			lform.user_name.select();
			return false;
		   }
		   if (lform.password.value=="")
		     {
			alert("Please enter password");
			lform.password.focus();
			lform.password.select();
			return false;
		   }
  }