if (document.images) {        
        
		img0off = new Image();
        img0off.src = "images/nav/fleet_sky_black.gif";
        img1off = new Image();
        img1off.src = "images/nav/fish_reports_sky_black.gif";
        img2off = new Image();
        img2off.src = "images/nav/articles_sky_black.gif";
        img3off = new Image();
        img3off.src = "images/nav/fishing_tips_sky_black.gif";
        img4off = new Image();
        img4off.src = "images/nav/fishing_regs_sky_black.gif";
        img5off = new Image();
        img5off.src = "images/nav/weather_sky_black.gif";
        img6off = new Image();
        img6off.src = "images/nav/about_us_sky_black.gif";
        img7off = new Image();
        img7off.src = "images/nav/links_sky_black.gif";
		img8off = new Image();
        img8off.src = "images/nav/home_sky_black.gif";
		
		img0on = new Image();
        img0on.src = "images/nav/fleet_sky_blue.gif";
        img1on = new Image();
        img1on.src = "images/nav/fish_reports_sky_blue.gif";
        img2on = new Image();
        img2on.src = "images/nav/articles_sky_blue.gif";
        img3on = new Image();
        img3on.src = "images/nav/fishing_tips_sky_blue.gif";
        img4on = new Image();
        img4on.src = "images/nav/fishing_regs_sky_blue.gif";
        img5on = new Image();
        img5on.src = "images/nav/weather_sky_blue.gif";
        img6on = new Image();
        img6on.src = "images/nav/about_us_sky_blue.gif";
        img7on = new Image();
        img7on.src = "images/nav/links_sky_blue.gif";
		img8on = new Image();
        img8on.src = "images/nav/home_sky_blue.gif";
		
		preload = 1;
      }
      
      // Function to 'activate' images.
      function imgOn(imgName) {
            if (document.images)  {
            if(preload == 1) {
                document[imgName].src = eval(imgName + "on.src");
            }
      }
}
      
      // Function to 'deactivate' images.
      function imgOff(imgName) {
            if (document.images)  {
            if(preload == 1) {
                document[imgName].src = eval(imgName + "off.src");
            }
      }
}