var aImgPreloader = new Array;
// imageName, imageSrc, imageOverSrc
// add a new line for each img that needs to be preloaded
aImgPreloader[aImgPreloader.length] = new Array('home','http://sprint.skinit.com/images/home_btn.gif','http://sprint.skinit.com/images/home_btn_over.gif');
aImgPreloader[aImgPreloader.length] = new Array('skins','http://sprint.skinit.com/images/skins_btn.gif','http://sprint.skinit.com/images/skins_btn_over.gif');
aImgPreloader[aImgPreloader.length] = new Array('devices','http://sprint.skinit.com/images/devices_btn.gif','http://sprint.skinit.com/images/devices_btn_over.gif');
aImgPreloader[aImgPreloader.length] = new Array('pin','http://sprint.skinit.com/images/pincards_btn.gif','http://sprint.skinit.com/images/pincards_btn_over.gif');
aImgPreloader[aImgPreloader.length] = new Array('help','http://sprint.skinit.com/images/help_btn.gif','http://sprint.skinit.com/images/help_btn_over.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;


		}
	}
}