var aImgBoxes = [
				 'pinkflowers.jpg',
				 'blueflowers.jpg',
				 'trees.jpg'
				 ];

$(document).ready(function() {
	var sImgBox = aImgBoxes[Math.floor(Math.random()*aImgBoxes.length)];
	$("div#imgbox").css("background-image", "url('/_common/images/panels/" + sImgBox + "')");
});