img0_on = new Image(15,63);
		img0_on.src="images/button_contact_on.gif";
		img1_on = new Image(15,135);
		img1_on.src="images/button_cs_on.gif";
		img2_on = new Image(15,151);
		img2_on.src="images/button_history_on.gif";
		img3_on = new Image(15,49);
		img3_on.src="images/button_home_on.gif";
		img4_on = new Image(15,80);
		img4_on.src="images/button_marketing_on.gif";
		img5_on = new Image(15,101);
		img5_on.src="images/button_pl_on.gif";
		img6_on = new Image(15,144);
		img6_on.src="images/button_so_on.gif";
		img7_on = new Image(15,79);
		img7_on.src="images/button_transport_on.gif";
        img8_on = new Image(15,63);
        img8_on.src="images/button_jobs_on.gif";
        img9_on = new Image(15,59);
        img9_on.src="images/prodlist_on.jpg";


		img0_off = new Image(15,63);
		img0_off.src="images/button_contact.gif";
		img1_off = new Image(15,135);
		img1_off.src="images/button_cs.gif";
		img2_off = new Image(15,151);
		img2_off.src="images/button_history.gif";
		img3_off = new Image(15,49);
		img3_off.src="images/button_home.gif";
		img4_off = new Image(15,80);
		img4_off.src="images/button_marketing.gif";
		img5_off = new Image(15,101);
		img5_off.src="images/button_pl.gif";
		img6_off = new Image(15,144);
		img6_off.src="images/button_so.gif";
		img7_off = new Image(15,79);
		img7_off.src="images/button_transport.gif";
        img8_off = new Image(15,63);
        img8_off.src = "images/button_jobs.gif";
        img9_off = new Image(15,59);
        img9_off.src = "images/prodlist.jpg";

		function over_image(parm_name)
		{
		document[parm_name].src = eval(parm_name + "_on.src");
		}
		function off_image(parm_name)
		{
		document[parm_name].src = eval(parm_name + "_off.src");
		}