function showRandom() {
	var images = new Array();
	images[0] ="/images/home_photo01.jpg";
	images[1] ="/images/home_photo02.jpg";
	images[2] ="/images/home_photo03.jpg";
	images[3] ="/images/home_photo04.jpg";
	images[4] ="/images/home_photo05.jpg";
	var rdm = Math.floor(Math.random()*images.length);
	document.getElementById("container-center").style.background = "url("+images[rdm]+") top left no-repeat";
}