if (document.images)
   {
     pic1on= new Image(169,43);
     pic1on.src="images/audiosession_design_04_hover.jpg";  
     pic1off= new Image(169,43);
     pic1off.src="images/audiosession_design_04.jpg";

     pic2on= new Image(169,42);
     pic2on.src="images/audiosession_design_08_hover.jpg";  
     pic2off= new Image(169,42);
     pic2off.src="images/audiosession_design_08.jpg";

     pic3on= new Image(169,37);
     pic3on.src="images/audiosession_design_09_hover.jpg";  
     pic3off= new Image(169,37);
     pic3off.src="images/audiosession_design_09.jpg";

     pic4on= new Image(169,41);
     pic4on.src="images/audiosession_design_10_hover.jpg";  
     pic4off= new Image(169,41);
     pic4off.src="images/audiosession_design_10.jpg";

     pic5on= new Image(169,40);
     pic5on.src="images/audiosession_design_11_hover.jpg";  
     pic5off= new Image(169,40);
     pic5off.src="images/audiosession_design_11.jpg";

     pic6on= new Image(169,42);
     pic6on.src="images/audiosession_design_12_hover.jpg";  
     pic6off= new Image(169,42);
     pic6off.src="images/audiosession_design_12.jpg";

     pic7on= new Image(169,37);
     pic7on.src="images/audiosession_design_13_hover.jpg";  
     pic7off= new Image(169,37);
     pic7off.src="images/audiosession_design_13.jpg";

     pic8on= new Image(169,40);
     pic8on.src="images/audiosession_design_14_hover.jpg";  
     pic8off= new Image(169,40);
     pic8off.src="images/audiosession_design_14.jpg";

     pic9on= new Image(169,40);
     pic9on.src="images/audiosession_design_15_hover.jpg";  
     pic9off= new Image(169,40);
     pic9off.src="images/audiosession_design_15.jpg";

     pic10on= new Image(169,41);
     pic10on.src="images/audiosession_design_16_hover.jpg";  
     pic10off= new Image(169,41);
     pic10off.src="images/audiosession_design_16.jpg";
   }

function lightup(imgName)
 {
   if (document.images)
    {
      imgOn=eval(imgName + "on.src");
      document[imgName].src= imgOn;
    }
 }

function turnoff(imgName)
 {
   if (document.images)
    {
      imgOff=eval(imgName + "off.src");
      document[imgName].src= imgOff;
    }
 }