if (document.images) {
bullet_on_left = new Image
bullet_off_left = new Image
bullet_on_left.src = "images/bullet_on_left.gif"
bullet_off_left.src = "images/spacer.gif"
bullet_on_right = new Image
bullet_off_right = new Image
bullet_on_right.src = "images/bullet_on_right.gif"
bullet_off_right.src = "images/spacer.gif"
}