h01a = new Image();
h01b = new Image();
h02a = new Image();
h02b = new Image();
h03a = new Image();
h03b = new Image();
h04a = new Image();
h04b = new Image();

h01a.src = "/common/topmenu/menu1-off.gif";
h01b.src = "/common/topmenu/menu1-on.gif";
h02a.src = "/common/topmenu/menu2-off.gif";
h02b.src = "/common/topmenu/menu2-on.gif";
h03a.src = "/common/topmenu/menu3-off.gif";
h03b.src = "/common/topmenu/menu3-on.gif";
h04a.src = "/common/topmenu/menu4-off.gif";
h04b.src = "/common/topmenu/menu4-on.gif";

function display(location, source) { document[location].src = eval(source + ".src"); }