function newImage(arg) {
rslt = new Image();
rslt.src = arg;
return rslt;
}

var preloadFlag = false;
function preloadImages() {
button_str_m = newImage("img/str_m.gif");
button_blank = newImage("img/bl.gif");
button_adm_pagemap = newImage("img/adm_pagemap.gif");
preloadFlag = true;
}