function lift_box(parent, chaiser, start_y, offset_y) {
	$parent = document.getElementById(parent);
	$parent_y = $parent.offsetTop;
	$parent_height = $parent.offsetHeight;
	$chaiser = document.getElementById(chaiser);
	$chaiser_y = $chaiser.offsetTop;

	if (($parent_y + $parent_height) > start_y) {
		document.getElementById(chaiser).style.top = $parent_y + $parent_height + offset_y + "px";
	}
}