var preload = new Image();
preload.src = "images/top.gif";

menu_01off = new Image(); menu_01off.src = "images/menu_uns_01.gif";
menu_01on = new Image(); menu_01on.src = "images/menu_sel_01.gif";
menu_02off = new Image(); menu_02off.src = "images/menu_uns_02.gif";
menu_02on = new Image(); menu_02on.src = "images/menu_sel_02.gif";
menu_03off = new Image(); menu_03off.src = "images/menu_uns_03.gif";
menu_03on = new Image(); menu_03on.src = "images/menu_sel_03.gif";
menu_04off = new Image(); menu_04off.src = "images/menu_uns_04.gif";
menu_04on = new Image(); menu_04on.src = "images/menu_sel_04.gif";
menu_05off = new Image(); menu_05off.src = "images/menu_uns_05.gif";
menu_05on = new Image(); menu_05on.src = "images/menu_sel_05.gif";
menu_06off = new Image(); menu_06off.src = "images/menu_uns_06.gif";
menu_06on = new Image(); menu_06on.src = "images/menu_sel_06.gif";
menu_07off = new Image(); menu_07off.src = "images/menu_uns_07.gif";
menu_07on = new Image(); menu_07on.src = "images/menu_sel_07.gif";
menu_08off = new Image(); menu_08off.src = "images/menu_uns_08.gif";
menu_08on = new Image(); menu_08on.src = "images/menu_sel_08.gif";
menu_09off = new Image(); menu_09off.src = "images/menu_uns_09.gif";
menu_09on = new Image(); menu_09on.src = "images/menu_sel_09.gif";

function over(menu) {
  document[menu].src = eval(menu + "on.src");

}
function out(menu) {
  document[menu].src = eval(menu + "off.src");
}

function doGIF() {
document['top_gif'].src = preload.src;
}