function validateForm()
{
	//trim fields
	trimFields();
	if(obj.user_id.value == "")
	{
		alert("Please enter your user ID.");
		obj.user_id.focus();
		return false;
	}
	if(obj.password.value == "")
	{
		alert("Please enter your password.");
		obj.password.focus();
		return false;
	}
	//All okay?
	return true;
}