Автоматическая смена фона

<img  src="" alt="background" id="bg" style="display:none" />
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.3/jquery.min.js"></script> 
<script type="text/javascript" class="noprint">
	var aImages = new Array();
	var aURL = new Array();
	var aArtists = new Array();
	var iPrev = -1;
	var iRnd = -1;
 
	aImages[0] = "templates/_default_/images/bg/bg.jpg";
	aImages[1] = "templates/_default_/images/bg/bg1.jpg";
	aImages[2] = "templates/_default_/images/bg/bg2.jpg";
	aImages[3] = "templates/_default_/images/bg/bg3.jpg";
 
 
 
 
	$(document).ready(function() {
 
 
		$("img#bg").load(function()
			{
 
				$("img#bg").fadeTo(2000,1);
 
 
 
				setTimeout(function() 
					{
						$("#image_description").animate({right: '-=150'}, 1000);
						$("img#bg").fadeOut(2000);
 
 
						setTimeout(LoadImages,3000);
					}
					,3000);
			}			
		)
 
 
		setTimeout(LoadImages,100);
 
	});
 
	function LoadImage(iNr)
	{
		$("img#bg").attr("src", aImages[iNr]);						
	};
 
	function LoadImages()
	{
 
		/* Select a random image number and make sure this is not equal to the previous image */
		while(iPrev == iRnd)
		{
			iRnd = Math.floor(Math.random()*aImages.length);
		}
 
		/* Show the selected image */
		LoadImage(iRnd);
 
		iPrev = iRnd;
 
	};
</script>

img#bg {
	/* Stretch background */
		position: fixed;
	top:0;
	left:0;
	width:100%;
	z-index:-3;
}