var aImgPreloader = new Array;

var urlRoot="../images/";
aImgPreloader[aImgPreloader.length] = new Array('printer_friendly',urlRoot+'printer_friendly.gif',urlRoot+'printer_friendly_mo.gif');
aImgPreloader[aImgPreloader.length] = new Array('tell_a_friend',urlRoot+'tell_a_friend.gif',urlRoot+'tell_a_friend_mo.gif');
aImgPreloader[aImgPreloader.length] = new Array('home',urlRoot+'home.gif',urlRoot+'home_mo.gif');
aImgPreloader[aImgPreloader.length] = new Array('aboutus',urlRoot+'aboutus.gif',urlRoot+'aboutus_mo.gif');
aImgPreloader[aImgPreloader.length] = new Array('getinvolved',urlRoot+'getinvolved.gif',urlRoot+'getinvolved_mo.gif');
aImgPreloader[aImgPreloader.length] = new Array('calendar',urlRoot+'calendar.gif',urlRoot+'calendar_mo.gif');
aImgPreloader[aImgPreloader.length] = new Array('news',urlRoot+'news.gif',urlRoot+'news_mo.gif');
aImgPreloader[aImgPreloader.length] = new Array('programsandservices',urlRoot+'programsandservices.gif',urlRoot+'programsandservices_mo.gif');
aImgPreloader[aImgPreloader.length] = new Array('resources',urlRoot+'resources.gif',urlRoot+'resources_mo.gif');
aImgPreloader[aImgPreloader.length] = new Array('donatenow',urlRoot+'donatenow.gif',urlRoot+'donatenow_mo.gif');

// load up image container object based on previous array
var oImgContainer = new Object;
for(i=0;i<aImgPreloader.length;i++){
	if(document.images){
		oImgContainer[aImgPreloader[i][0]] = new Image;
		oImgContainer[aImgPreloader[i][0]].src = aImgPreloader[i][1];
		oImgContainer[aImgPreloader[i][0] + 'On'] = new Image;
		oImgContainer[aImgPreloader[i][0] + 'On'].src = aImgPreloader[i][2];
	}
}

// rollover function
// image name (sImg) corresponds with aImgPreloader and name attribute of tag
function roll(sImg,bOver){
	if(document.images){
		if (bOver) {
			document.images[sImg].src = oImgContainer[sImg + 'On'].src;
		} else {
			document.images[sImg].src = oImgContainer[sImg].src;


		}
	}
}