BrowserName = navigator.appName;
BrowserVer  = parseInt(navigator.appVersion);
version = "bad";

if((BrowserName == "Netscape" && BrowserVer >= 3) ||
   (BrowserName == "Microsoft Internet Explorer" && BrowserVer >= 3))
     version = "good";
name="";
var flag = new Array(10);
for(i=0; i<10; i++) flag[i]=0;

if(version == "good")
{
  b1on = new Image(236,56);
  b1on.src = "images/b1_1.gif";
  b2on = new Image(260,56);
  b2on.src = "images/b2_1.gif";
  b3on = new Image(90,142);
  b3on.src = "images/b3_1.gif";
  b4on = new Image(90,142);
  b4on.src = "images/b4_1.gif";
  b5on = new Image(90,142);
  b5on.src = "images/b5_1.gif";
  b6on = new Image(90,142);
  b6on.src = "images/b6_1.gif";
  b7on = new Image(90,142);
  b7on.src = "images/b7_1.gif";

  b1off = new Image(236,56);
  b1off.src = "images/b1.gif";
  b2off = new Image(260,56);
  b2off.src = "images/b2.gif";
  b3off = new Image(90,142);
  b3off.src = "images/b3.gif";
  b4off = new Image(90,142);
  b4off.src = "images/b4.gif";
  b5off = new Image(90,142);
  b5off.src = "images/b5.gif";
  b6off = new Image(90,142);
  b6off.src = "images/b6.gif";
  b7off = new Image(90,142);
  b7off.src = "images/b7.gif";

}
function img_act(imgName) 
{
    flag[imgName]=1;
    if(version=="good")
    {
      imgOn = eval(imgName + "on.src");
      document [imgName].src = imgOn;
    }
}
function img_inact(imgName) 
{
    flag[imgName]=0;
    if(version=="good")
    {
      imgOff = eval(imgName + "off.src");
      document [imgName].src = imgOff;
    }
}
function img_click(imgName) 
{
      if(version=="good")
      {
        imgOff = eval(imgName + "off.src");
        document [imgName].src = imgOff;
        name=imgName;
        setTimeout('wait()', 70)
    }
}
function wait()
{
    if(flag[name]==1)
    {
      imgOn = eval(name + "on.src");
      document [name].src = imgOn;
    }
}