//========================= pre-cache images =========================//
if (document.images) {
	
	temp['topnav_about']		= 'gif';
	temp['topnav_products']		= 'gif';
	temp['topnav_science']		= 'gif';
	temp['topnav_news']			= 'gif';
	temp['topnav_investors']	= 'gif';
	temp['topnav_careers']		= 'gif';
	temp['topnav_contactus']	= 'gif';
	
	temp['footer_search']		= 'gif';
	temp['footer_contact'] 		= 'gif';
	temp['footer_sitemap'] 		= 'gif';
	
	
	for (imgName in temp) {
		preload(imgName, 'images/', temp[imgName]);
	}
}