ULink = new Array();
for (i = 0; i <= 150; i++) {ULink[i] = new Image();ULink[i].src = 'image/menu_on' + i + '.gif';}

function LinkI (n) {
    document.images['Link' + n].src = ULink[n].src;}
function LinkO(n) {
    document.images['Link' + n].src = 'image/menu_off' + n + '.gif';}