function preLoadImages(hostname) {
		if(document.images) {
			
			// set image urls
			image_urls = new Array();
			image_urls[0] = "/templates/electric-planet/images/EPTopCats5A2.gif";
			image_urls[1] = "/templates/electric-planet/images/EPTopCats5B2.gif";
			image_urls[2] = "/templates/electric-planet/images/EPTopCats5C2.gif";
			image_urls[3] = "/templates/electric-planet/images/EPTopCats5D2.gif";
			image_urls[4] = "/templates/electric-planet/images/EPTopCats5E2.gif";
			image_urls[5] = "/templates/electric-planet/images/EPTopCats5F2.gif";
			image_urls[6] = "/templates/electric-planet/images/EP_BuyButtonBig1B.gif";
			image_urls[7] = "/templates/electric-planet/images/EP_SearchButton1B.gif";
			image_urls[8] = "/templates/electric-planet/images/EP_SignUpButton6B.gif";
			image_urls[9] = "/templates/electric-planet/images/EP_SmRecalcButton1B.gif";
			image_urls[10] = "/templates/electric-planet/images/EP_ViewCartButton2B.gif";
			image_urls[11] = "/templates/electric-planet/images/BuyButtSmallB.gif";
			image_urls[12] = "/templates/electric-planet/images/EP_ContinueButt3B.gif";
			image_urls[13] = "/templates/electric-planet/images/RecalcMainSmallB.gif";
			image_urls[14] = "/templates/electric-planet/images/CheckoutButtSmall2B.gif";
			image_urls[15] = "/templates/electric-planet/images/EPBottomCats2.1GreyA2.gif";
			image_urls[16] = "/templates/electric-planet/images/EPBottomCats2.1GreyB2.gif";
			image_urls[17] = "/templates/electric-planet/images/ContinueShopButt2B.gif";
			image_urls[18] = "/templates/electric-planet/images/CheckoutSmall2B.gif";
			image_urls[19] = "/templates/electric-planet/images/MoreInfoButtSmallB.gif";
			image_urls[20] = "/templates/electric-planet/images/AddNewAddressButtB.gif";
			image_urls[21] = "/templates/electric-planet/images/EP_SmRecalcButton1B.gif";
			image_urls[22] = "/templates/electric-planet/images/system-message-bg2.gif";
			
			for(i=0; i<image_urls.length; i++) {
				imageObject = new Image();
				imageObject.src = image_urls[i];
			}
		}
	}