// JavaScript Document
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) {
			if (arguments[i] != nav_id){
			//if (document[changeImages.arguments[i]].name != nav_id){
				document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
			//}
			}
		}
	}
}

var over_img = new Array();
over_img[0] = "images/nav/challenge-ov.gif";
over_img[1] = "images/nav/approach-ov.gif";
over_img[2] = "images/nav/institute-ov.gif";
over_img[3] = "images/nav/start-ov.gif";
over_img[4] = "images/nav/alliance-ov.gif";
over_img[5] = "/images/nav/resource-ov.gif";
over_img[6] = "images/nav/news-ov.gif";
over_img[7] = "images/nav/donate-ov.gif";
over_img[8] = "images/nav/contact-ov.gif";
over_img[9] = "images/nav/home-ov.gif";
over_img[10] = "images/nav/volunteer-ov.gif";

function show_rollover(img_name, roll_obj){
	if (document.images) { document[img_name].src = over_img[roll_obj]; }
}


var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		roll_01_over = newImage("images/nav/challenge-ov.gif");
		roll_02_over = newImage("images/nav/approach-ov.gif");
		roll_03_over = newImage("images/nav/institute-ov.gif");
		roll_04_over = newImage("images/nav/start-ov.gif");
		roll_05_over = newImage("images/nav/alliance-ov.gif");
		roll_06_over = newImage("/images/nav/resource-ov.gif");
		roll_07_over = newImage("images/nav/news-ov.gif");
		roll_08_over = newImage("images/nav/donate-ov.gif");
		roll_09_over = newImage("images/nav/contact-ov.gif");
		roll_10_over = newImage("images/nav/home-ov.gif");
		roll_11_over = newImage("images/nav/volunteer-ov.gif");
		preloadFlag = true;
	}
}