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");
company_profile_over=newImage("images/products-over.gif");
services_over=newImage("images/downloads-over.gif");
partners_over=newImage("images/buy-over.gif");
contacts_over=newImage("images/contacts-over.gif");
preloadFlag=true;
}}