if (document.images) {

            img1on = new Image();

            img1on.src = "images/nav_01a.gif";

           	

			img2on = new Image();

            img2on.src = "images/nav_02a.gif";



			img3on = new Image();

            img3on.src = "images/nav_03a.gif";


            img4on = new Image();

            img4on.src = "images/nav_04a.gif";


            img5on = new Image();

            img5on.src = "images/nav_05a.gif";


            img6on = new Image();

            img6on.src = "images/nav_06a.gif";


            img7on = new Image();

            img7on.src = "images/nav_07a.gif";


            img8on = new Image();

            img8on.src = "images/nav_08a.gif";


            img11on = new Image();

            img11on.src = "images/nav_11a.gif";
            
                        
            img12on = new Image();

            img12on.src = "images/navlt_01a.gif";


            img13on = new Image();

            img13on.src = "images/navlt_02a.gif";


            img14on = new Image();

            img14on.src = "images/navlt_03a.gif";


			



            img1off = new Image();

            img1off.src = "images/nav_01b.gif";



            img2off = new Image();

            img2off.src = "images/nav_02b.gif";



            img3off = new Image();

            img3off.src = "images/nav_03b.gif";


            img4off = new Image();

            img4off.src = "images/nav_04b.gif";


            img5off = new Image();

            img5off.src = "images/nav_05b.gif";


            img6off = new Image();

            img6off.src = "images/nav_06b.gif";


            img7off = new Image();

            img7off.src = "images/nav_07b.gif";


            img8off = new Image();

            img8off.src = "images/nav_08b.gif";


            img11off = new Image();

            img11off.src = "images/nav_11b.gif";


            img12off = new Image();

            img12off.src = "images/navlt_01b.gif";


            img13off = new Image();

            img13off.src = "images/navlt_02b.gif";


            img14off = new Image();

            img14off.src = "images/navlt_03b.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");

        }

}