<!--
        var    aa = 0 ;
        var    name = "";
        var    num = 0;
        if (document.images) {

            img1on = new Image ();
            img1on.src = "img/chn02.gif";
            img1off = new Image ();
            img1off.src = "img/chn01.gif";

            img2on = new Image ();
            img2on.src = "img/chn04.gif";
            img2off = new Image ();
            img2off.src = "img/chn03.gif";

            img3on = new Image ();
            img3on.src = "img/chn06.gif";
            img3off = new Image ();
            img3off.src = "img/chn05.gif";
        }

function imgOn(imgName,flag) {
if ((aa==0) | (aa != flag))
   {        if (document.images)
           {
            document[imgName].src = eval(imgName + "on.src");
           }
  }
}
function imgOff(imgName,flag) {
if ((aa==0) | (aa != flag))
        {if (document.images) {
            document[imgName].src = eval(imgName + "off.src");
        }
}
}
// -->