function validate_form ()
{
    valid = true;

    if ( document.reminder.username.value == "" )
    {
        alert ( "Please provide your Username" );
        valid = false;
    }
	
	else if ( document.reminder.email.value == "" )
    {
        alert ( "Please provide your Email Address" );
        valid = false;
    }
			
    return valid;
}