imgroll = new Array();
imgroll[0] = "";// ok to leave empty
imgroll[1] = "ill-05-nav-tix";
imgroll[2] = "ill-05-nav-ifund";
imgroll[3] = "ill-05-nav-store";

onimages = [];
offimages = [];
for(i=0; i < imgroll.length; i++){
	onimages[i] =  new Image();
	onimages[i].src = "http://graphics.fansonly.com/schools/ill/graphics/"+imgroll[i]+"-on.gif";
	offimages[i] =  new Image();
	offimages[i].src = "http://graphics.fansonly.com/schools/ill/graphics/"+imgroll[i]+"-off.gif";
}
function imgOn(imageName) {
	num = imageName.split("e");
	document[imageName].src = onimages[num[1]].src;  
}
function imgOff(imageName) {  
	num = imageName.split("e");
	document[imageName].src = offimages[num[1]].src;  
}