var layoutDir = "/images/interface/rotate/";
var hdArr = new Array();
	hdArr[0] = layoutDir + "1.jpg";
	hdArr[1] = layoutDir + "2.jpg";
	hdArr[2] = layoutDir + "3.jpg";
	hdArr[3] = layoutDir + "4.jpg";
	hdArr[4] = layoutDir + "5.jpg";

function randomImg(imgName){
	var ranNum = Math.round(Math.random() * (hdArr.length - 1));
	document.images[imgName].src = hdArr[ranNum];
}