imgroll = new Array();
imgroll[0] = "";// ok to leave empty

imgroll[1] = "bay-nav1-tickets";
imgroll[2] = "bay-nav1-store";
imgroll[3] = "bay-nav1-edu";
imgroll[4] = "bay-nav1-foundat";
imgroll[5] = "bay-nav1-travel";

imgroll[6] = "bay-nav1-news";
imgroll[7] = "bay-nav1-scheds";
imgroll[8] = "bay-nav1-roster";
imgroll[9] = "bay-nav1-archives";

onimages = [];
offimages = [];
for(i=0; i < imgroll.length; i++){
	onimages[i] =  new Image();
	onimages[i].src = "http://graphics.fansonly.com/schools/bay/graphics/"+imgroll[i]+"-on.gif";
	offimages[i] =  new Image();
	offimages[i].src = "http://graphics.fansonly.com/schools/bay/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;  
}