function optim(){
	//preload images
	if (document.images) {
		arImageSrc = new Array (
//			"images/header.gif",
//			"images/menuFooter.gif",
			"images/titleBiker.jpg",
//			"images/footer.gif",
			"images/Silenttreatment2_2.jpg",
			"images/101-0116_IMG_2.jpg",
			"images/jasonwidowmaker_2.jpg",
			"images/Silenttreatment_2.jpg",
//			"images/spacer.gif"
			"images/nice_2.jpg"
	    )
	
	    arImageList = new Array ();
	    for (counter in arImageSrc) {
	        arImageList[counter] = new Image();
	        arImageList[counter].src = arImageSrc[counter];
	    }
	}
}