<!--
 /* 按钮变化 */

        var    aa = 0 ;
        var    name = "";
        var    num = 0;
        if (document.images) {

            img1on = new Image ();
            img1on.src = "img/butt0102.gif";
            img1off = new Image ();
            img1off.src = "img/butt0101.gif";

            img2on = new Image ();
            img2on.src = "img/butt0202.gif";
            img2off = new Image ();
            img2off.src = "img/butt0201.gif";

            img3on = new Image ();
            img3on.src = "img/butt0302.gif";
            img3off = new Image ();
            img3off.src = "img/butt0301.gif";

            img4on = new Image ();
            img4on.src = "img/butt0402.gif";
            img4off = new Image ();
            img4off.src = "img/butt0401.gif";

            img5on = new Image ();
            img5on.src = "img/butt0102.jpg";
            img5off = new Image ();
            img5off.src = "img/butt0101.jpg";

            img6on = new Image ();
            img6on.src = "img/butt0202.jpg";
            img6off = new Image ();
            img6off.src = "img/butt0201.jpg";

            img7on = new Image ();
            img7on.src = "img/butt0302.jpg";
            img7off = new Image ();
            img7off.src = "img/butt0301.jpg";

            img8on = new Image ();
            img8on.src = "img/butt0402.jpg";
            img8off = new Image ();
            img8off.src = "img/butt0401.jpg";

        }

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");
        }
}
}

// -->