function validLogin(login_form)
{
var username = document.login_form.User_Name.value;
var password = document.login_form.Password.value;

if(username == "" || username == null)
{
 	  window.alert("من فضل ادخل اسم المستخدم");
  	  login_form.User_Name.focus();
	  login_form.User_Name.select();
	  return (false);
}

else if(password == "" || password == null)
{
 	  window.alert("من فضلك ادخل كلمة المرور");
  	  login_form.Password.focus();
	  login_form.Password.select();
	  return (false);
}


}