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) {
but_home_over = newImage("images/but_home_over.gif");
but_aboutus_over = newImage("images/but_aboutus_over.gif");
but_pipesuppliy_over = newImage("images/but_pipesuppliy_over.gif");
but_fabrication_over = newImage("images/but_fabrication_over.gif");
but_brochure_over = newImage("images/but_brochure_over.gif");
but_insu_over = newImage("images/but_insu_over.gif");
but_products_over = newImage("images/but_products_over.gif");
but_contact_over = newImage("images/but_contact_over.gif");
but_fire_over = newImage("images/but_firev_over.gif");
but_antiv_over = newImage("images/but_antiv_over.gif");
but_pricelist_over = newImage("images/but_pricelist_over.gif");
but_prefab_over = newImage("images/but_prefab_over.gif");
preloadFlag = true;
}
}

function loadURL(pagename) {
var winl = (screen.width-550)/2;
var wint = (screen.height-550)/2;
settings='height=550,width=550,top='+wint+',left='+winl+',scrollbars=0,toolbar=0,location=0,status=0,menubar=0,resizable=0,dependent=0,copyhistory=0' 
{
MyPopUp = window.open(pagename,"",settings)
}
}