//Generate a random image
randPic = Math.round(Math.random()*20/4);
currPic = "images/rand_front" + randPic + ".jpg";

//preload mouse rollovers
function preload() {
        if (document.images){
                var ar = new Array();
                var args = preload.arguments;
                for (var i = 0; i < args.length; i++) {
                        ar[i] = new Image();
                        ar[i].src = args[i];
                }
        }
}
//onMouseOver code
function imgOver(imgName){
	document[imgName].src = "images/" + imgName + "_on.gif";
}
//onMouseOut code
function imgOff(imgName){
	document[imgName].src = "images/" + imgName + ".gif";
}