if (document.images) {
		madisonms= new Image
		madisonmsrollover = new Image
    	port = new Image
		portrollover = new Image
          hertzrental= new Image
		hertzrentalrollover = new Image
    	hertzsales = new Image
		hertzsalesrollover = new Image

		madisonms.src = "http://www.decaturtransit.com/images/madisonms.jpg"
		madisonmsrollover.src = "http://www.decaturtransit.com/images/madisonmsrollover.jpg"
		port.src = "http://www.decaturtransit.com/images/port.gif"
		portrollover.src = "http://www.decaturtransit.com/images/port_rollover.gif"
          hertzrental.src = "http://www.decaturtransit.com/images/hertzrental.jpg"
		hertzrentalrollover.src = "http://www.decaturtransit.com/images/hertzrental_rollover.jpg"
		hertzsales.src = "http://www.decaturtransit.com/images/hertzsales.gif"
		hertzsalesrollover.src = "http://www.decaturtransit.com/images/hertzsales_rollover.gif"
	}
	
	function chgImg(imgField,newImg) {
		if (document.images) {
			document[imgField].src= eval(newImg + ".src")
		}
	}