var ar_images = new Array();

function add_image(obj_name, image1, image2){
	ar_images[obj_name] = new Array();
	ar_images[obj_name][0] = new Image();
	ar_images[obj_name][0].src = '/images/' + image1;
	ar_images[obj_name][1] = new Image();
	ar_images[obj_name][1].src = '/images/' + image2;
}

function over_image(obj){
	obj.src	= ar_images[obj.id][0].src;
}
function leave_image(obj){
	obj.src	= ar_images[obj.id][1].src;
}