if (document.images)
   {
     pic1on= new Image(100,25);
     pic1on.src="./images/can_hover.jpg";

     pic2on= new Image(100,25);
     pic2on.src="./images/client_hover.jpg";

     pic3on= new Image(100,25);
     pic3on.src="./images/ref_hover.jpg";     

     pic4on= new Image(100,25);
     pic4on.src="./images/client_hover_o.jpg";   

     pic5on= new Image(100,25);
     pic5on.src="./images/client_hover_a.jpg";     

     pic1off= new Image(100,25);
     pic1off.src="./images/can_normal.jpg";     

     pic2off= new Image(100,25);
     pic2off.src="./images/client_normal.jpg";     

     pic3off= new Image(100,25);
     pic3off.src="./images/ref_normal.jpg";     

     pic4off= new Image(100,25);
     pic4off.src="./images/client_normal_o.jpg";  

     pic5off= new Image(100,25);
     pic5off.src="./images/client_normal_a.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;
    }
 }