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) {
		about 				= newImage("../images/template_images/nav_imgs/nav_02_about_over.gif");
		assessment_tools 	= newImage("../images/template_images/nav_imgs/nav_03_assessment_tools_over.gif");
		treatment			= newImage("../images/template_images/nav_imgs/nav_04_treatment_over.gif");
		product				= newImage("../images/template_images/nav_imgs/nav_05_product_over.gif");
		newsletter			= newImage("../images/template_images/nav_imgs/nav_06_newsletter_over.gif");
		leading_edge		= newImage("../images/template_images/nav_imgs/nav_08_leading_edge_over.gif");
		faq					= newImage("../images/template_images/nav_imgs/nav_09_faq_over.gif");
		related_links		= newImage("../images/template_images/nav_imgs/nav_10_related_links_over.gif");
		contact				= newImage("../images/template_images/nav_imgs/nav_11_contact_meridian_clinic_over.gif");
		privacy				= newImage("../images/template_images/nav_imgs/nav_12_privacy_policy_over.gif");
		preloadFlag = true;
	}
}