image01= new Image()
		image01.src="images/button_up.jpg"
		image02= new Image()
		image02.src="images/button_down.jpg"
		image03= new Image()
		image03.src="images/logo.jpg"
		image04= new Image()
		image04.src="images/logo_fade.jpg"
		

		function rollover(imagename, newsrc){
		document.images[imagename].src=newsrc.src
		}