if (document.images) {

bullet_on_left = new Image
bullet_off_left = new Image
bullet_on_left.src = "image/bullet_on_left.gif"
bullet_off_left.src = "image/bullet_off.gif"

bullet_on_right = new Image
bullet_off_right = new Image
bullet_on_right.src = "image/bullet_on_right.gif"
bullet_off_right.src = "image/bullet_off.gif"

}
else {

}