// JavaScript Document
function newImage(arg) {
         if (document.images) {
                 rslt = new Image();
                 rslt.src = arg;
                 return rslt;
         }
}

function changeImages() {
         if (document.images && (preloadFlag == true)) {
                 for (var i=0; i<changeImages.arguments.length; i+=2) {
                         document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
                 }
         }
}

var preloadFlag = false;
function preloadImages() {
         if (document.images) {
                 Home_over = newImage("images/Home-over.gif");
                 Stud_over = newImage("images/Stud-over.gif");
                 Work_over = newImage("images/Work-over.gif");
                 Abou_over = newImage("images/Abou-over.gif");
                 Cont_over = newImage("images/Cont-over.gif");
                 Link_over = newImage("images/Link-over.gif");
                 preloadFlag = true;
         }
}