function rotateImage()
{
	var img_name = new Array("summer.gif", "spring.gif", "fall.gif", "winter.gif");
	var l = img_name.length;
	var rnd_no = Math.round((l-1)*Math.random());
	var imgBannerPath = "url(images/backgrounds/banners/" + img_name[rnd_no] + ")";
	var imgContentPath = "url(images/backgrounds/bodies/" + img_name[rnd_no] + ")";
	document.getElementById('rotBanner').style.backgroundImage = imgBannerPath;
	document.getElementById('rotContent').style.backgroundImage = imgContentPath;
}