function randomHeader() {
	var Display = document.getElementById('indexbg');
	var randomnumber=Math.floor(Math.random()*4)

	switch (randomnumber)
	{
		case 0:
			Display.style.background = "url(http://www.mcrg.com/images/indexbg-1.jpg)";
			break;
		case 1:
			Display.style.background = "url(http://www.mcrg.com/images/indexbg-2.jpg)";
			break;
		case 2:
			Display.style.background = "url(http://www.mcrg.com/images/indexbg-3.jpg)";
			break;
		case 3:
			Display.style.background = "url(http://www.mcrg.com/images/indexbg-4.jpg)";
			break;
	}
}