function Form_Validator(theForm)
{	
	if (trim(theForm.Username.value) == '')
	{
		alert('Please enter a value for the Username field.');
		theForm.Username.value = '';
		theForm.Username.focus();
		return (false);
	}
	
	if (trim(theForm.Password.value) == '')
	{
		alert('Please enter a value for the Password field.');
		theForm.Password.value = '';
		theForm.Password.focus();
		return (false);
	}
	
	return true;
}