if (document.images)
 {
   pic1on= new Image(15,15);
   pic1on.src="/images/icons/i_print2.gif";  

   pic1off= new Image(15,15);
   pic1off.src="/images/icons/i_print1.gif";
   
   pic2on= new Image(15,15);
   pic2on.src="/images/icons/i_email2.gif";  

   pic2off= new Image(15,15);
   pic2off.src="/images/icons/i_email1.gif";
   
   pic3on= new Image(15,15);
   pic3on.src="/images/icons/i_acro2.gif";  

   pic3off= new Image(15,15);
   pic3off.src="/images/icons/i_acro1.gif";
}

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;
    }
 }