var myimages=new Array()
function preloadimages(){
for (i=0;i<preloadimages.arguments.length;i++){
myimages[i]=new Image()
myimages[i].src=preloadimages.arguments[i]
}
}

preloadimages
(
"images/pagetop.gif",
"images/isyn.jpg",
"images/is_map.jpg",
"images/isy_net.jpg",
"images/isy_net_hover.jpg",
"images/contact_bt.jpg",
"images/contact_bt_hover.jpg",
"images/bullet_cat.jpg"
)