if (document.images) {            

            img1on = new Image();   img1on.src = "images/b1a.gif"; 
            img2on = new Image();   img2on.src = "images/b2a.gif";
            img3on = new Image();   img3on.src = "images/b3a.gif";

            img4on = new Image();   img4on.src = "images/op_b1a.gif";
            img5on = new Image();   img5on.src = "images/op_b2a.gif";
			img5fon = new Image();  img5fon.src = "images/fb_b2.gif";
            img6on = new Image();   img6on.src = "images/op_b3a.gif";
            img7on = new Image();   img7on.src = "images/op_b4a.gif";
            img7aon = new Image();   img7aon.src = "images/op_b5a.gif";
            img7bon = new Image();   img7bon.src = "images/op_b6a.gif";

            img8on = new Image();   img8on.src = "images/cp_b1a.gif";			
            img9on = new Image();   img9on.src = "images/cp_b2a.gif";
            img10on = new Image();   img10on.src = "images/cp_b3a.gif";
            img11on = new Image();   img11on.src = "images/cp_b4a.gif";
            img12on = new Image();   img12on.src = "images/cp_b5a.gif";							
            img13on = new Image();   img13on.src = "images/cp_b6a.gif";
            img14on = new Image();   img14on.src = "images/cp_b7a.gif";
            img15on = new Image();   img15on.src = "images/cp_b8a.gif";
            img15aon = new Image();   img15aon.src = "images/cp_b9a.gif";

            img16on = new Image();   img16on.src = "images/fp_b1a.gif";
            img17on = new Image();   img17on.src = "images/cp_b10a.gif";





            img1off = new Image();  img1off.src = "images/b1.gif";
            img2off = new Image();  img2off.src = "images/b2.gif";
            img3off = new Image();  img3off.src = "images/b3.gif";

            img4off = new Image();  img4off.src = "images/op_b1.gif";
            img5off = new Image();  img5off.src = "images/op_b2.gif";
			img5foff = new Image();  img5foff.src = "images/fb_b1.gif";
            img6off = new Image();  img6off.src = "images/op_b3.gif";
            img7off = new Image();  img7off.src = "images/op_b4.gif";
            img7aoff = new Image();  img7aoff.src = "images/op_b5.gif";
            img7boff = new Image();  img7boff.src = "images/op_b6.gif";

            img8off = new Image();  img8off.src = "images/cp_b1.gif";
            img9off = new Image();  img9off.src = "images/cp_b2.gif";
            img10off = new Image();  img10off.src = "images/cp_b3.gif";
            img11off = new Image();  img11off.src = "images/cp_b4.gif";	
            img12off = new Image();  img12off.src = "images/cp_b5.gif";							
            img13off = new Image();  img13off.src = "images/cp_b6.gif";
            img14off = new Image();  img14off.src = "images/cp_b7.gif";
            img15off = new Image();  img15off.src = "images/cp_b8.gif";
            img15aoff = new Image();  img15aoff.src = "images/cp_b9.gif";

            img16off = new Image();  img16off.src = "images/fp_b1.gif";
            img17off = new Image();  img17off.src = "images/cp_b10.gif";
      }

    function imgOn(imgName) {
            if (document.images) {
                document[imgName].src = eval(imgName + "on.src");       
            }
    }

    function imgOff(imgName) {
            if (document.images) {
                document[imgName].src = eval(imgName + "off.src");        
            }
    }