if (document.images) {
  image1on = new Image();
  image1on.src = "../images/b1on.jpg";

  image2on = new Image();
  image2on.src = "../images/b2on.jpg";

  image3on = new Image();
  image3on.src = "../images/b3on.jpg";

  image4on = new Image();
  image4on.src = "../images/b4on.jpg";

  image5on = new Image();
  image5on.src = "../images/b5on.jpg";

  image6on = new Image();
  image6on.src = "../images/b6on.jpg";

  image10on = new Image();
  image10on.src = "../images/buttonon1.jpg";

  image11on = new Image();
  image11on.src = "../images/buttonon2.jpg";

  image12on = new Image();
  image12on.src = "../images/buttonon3.jpg";

  image13on = new Image();
  image13on.src = "../images/buttonon4.jpg";

  image14on = new Image();
  image14on.src = "../images/buttonon5.jpg";
  
  image15on = new Image();
  image15on.src = "../images/buttonon6.jpg";
  
  image16on = new Image();
  image16on.src = "../images/buttonon7.jpg";
  
  image17on = new Image();
  image17on.src = "../images/buttonon8.jpg";
  
  image18on = new Image();
  image18on.src = "../images/buttonon9.jpg";
  
  image19on = new Image();
  image19on.src = "../images/buttonon10.jpg";
  
  image20on = new Image();
  image20on.src = "../images/buttonon11.jpg";
    
  image21on = new Image();
  image21on.src = "../images/buttonon12.jpg";

  image22on = new Image();
  image22on.src = "../images/buttonon13.jpg";
  
  image23on = new Image();
  image23on.src = "../images/buttonon14.jpg";
  
  image24on = new Image();
  image24on.src = "../images/buttonon15.jpg";  
  
  image25on = new Image();
  image25on.src = "../images/buttonon16.jpg"; 
  
  image26on = new Image();
  image26on.src = "../images/buttonon17.jpg"; 
  
  image27on = new Image();
  image27on.src = "../images/buttonon18.jpg"; 
  
  image28on = new Image();
  image28on.src = "../images/buttonon19.jpg";
  
  image1off = new Image();
  image1off.src = "../images/b1.jpg";

  image2off = new Image();
  image2off.src = "../images/b2.jpg";

  image3off = new Image();
  image3off.src = "../images/b3.jpg";

  image4off = new Image();
  image4off.src = "../images/b4.jpg";

  image5off = new Image();
  image5off.src = "../images/b5.jpg";

  image6off = new Image();
  image6off.src = "../images/b6.jpg";
  
  image10off = new Image();
  image10off.src = "../images/button1.jpg";

  image11off = new Image();
  image11off.src = "../images/button2.jpg";

  image12off = new Image();
  image12off.src = "../images/button3.jpg";

  image13off = new Image();
  image13off.src = "../images/button4.jpg";

  image14off = new Image();
  image14off.src = "../images/button5.jpg";
  
  image15off = new Image();
  image15off.src = "../images/button6.jpg";
  
  image16off = new Image();
  image16off.src = "../images/button7.jpg";
  
  image17off = new Image();
  image17off.src = "../images/button8.jpg";
  
  image18off = new Image();
  image18off.src = "../images/button9.jpg";
  
  image19off = new Image();
  image19off.src = "../images/button10.jpg";
  
  image20off = new Image();
  image20off.src = "../images/button11.jpg";
  
  image21off = new Image();
  image21off.src = "../images/button12.jpg";
  
  image22off = new Image();
  image22off.src = "../images/button13.jpg";
  
  image23off = new Image();
  image23off.src = "../images/button14.jpg";

  image24off = new Image();
  image24off.src = "../images/button15.jpg";
  
  image25off = new Image();
  image25off.src = "../images/button16.jpg";
  
  image26off = new Image();
  image26off.src = "../images/button17.jpg";
  
  image27off = new Image();
  image27off.src = "../images/button18.jpg";
  
  image28off = new Image();
  image28off.src = "../images/button19.jpg";

}

function changeImages() {
  if (document.images) {
    for (var i=0; i<changeImages.arguments.length; i+=2) {
      document[changeImages.arguments[i]].src = eval(changeImages.arguments[i+1] + ".src");
    }
  }
}