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) {
nav_home_over = newImage("images/nav/nav_home_over.gif");
nav_engravedrings_over = newImage("images/nav/nav_engravedrings_over.gif");
nav_jewelryengraving_over = newImage("images/nav/nav_jewelryengraving_over.gif");
nav_aboutlaser_over = newImage("images/nav/nav_aboutlaser_over.gif");
nav_vowlist_over = newImage("images/nav/nav_vowlist_over.gif");
nav_order_over = newImage("images/nav/nav_order_over.gif");
nav_faq_over = newImage("images/nav/nav_faq_over.gif");
nav_guarantee_over = newImage("images/nav/nav_guarantee_over.gif");
nav_pr_over = newImage("images/nav/nav_pr_over.gif");
nav_weddinglinks_over = newImage("images/nav/nav_weddinglinks_over.gif");
nav_seller_over = newImage("images/nav/nav_seller_over.gif");
nav_about_over = newImage("images/nav/nav_about_over.gif");
nav_testimonials_over = newImage("images/nav/nav_testimonials_over.gif");
nav_contact_over = newImage("images/nav/nav_contact_over.gif");
nav_sitemap_over = newImage("images/nav/nav_sitemap_over.gif");
preloadFlag = true;
}
}