The update() for our Image of the Month Widget

gistfile1.aw

<?php

function update( $new_instance, $old_instance )
{
    $instance = $old_instance;

    $instance['headline']            = strip_tags( $new_instance['headline'] );
    $instance[$this->image_field]    = intval( strip_tags( $new_instance[$this->image_field] ) );
    $instance['blurb']               = strip_tags( $new_instance['blurb'] );

    return $instance;
}