browserName=navigator.appName; 
browserVer=parseInt(navigator.appVersion);

  if ((browserName=="Netscape" && browserVer>=3) || (browserName=="Microsoft Internet Explorer" && browserVer>=4))    
  version="n3";
  else
    version="n2";

  if (version=="n3")
   {

     pineappleon= new Image();
     pineappleon.src="images/btm_pineapple_on.jpg";  
     pineappleoff= new Image();
     pineappleoff.src="images/btm_pineapple_off.jpg";  
     
     payoption1on= new Image();
     payoption1on.src="images/pay_option_1_on.jpg";  
     payoption1off= new Image();
     payoption1off.src="images/pay_option_1_off.jpg";  

     payoption2on= new Image();
     payoption2on.src="images/pay_option_2_on.jpg";  
     payoption2off= new Image();
     payoption2off.src="images/pay_option_2_off.jpg";       

     payoption3on= new Image();
     payoption3on.src="images/pay_option_3_on.jpg";  
     payoption3off= new Image();
     payoption3off.src="images/pay_option_3_off.jpg";  
     
     payoption4on= new Image();
     payoption4on.src="images/pay_option_4_on.jpg";  
     payoption4off= new Image();
     payoption4off.src="images/pay_option_4_off.jpg";  

   }

function lightup(imgName)
 {
   if (version=="n3")
    {
      imgOn=eval(imgName + "on.src");
      document[imgName].src= imgOn;
    }
 }

function turnoff(imgName)
 {
   if (version=="n3")
    {
      imgOff=eval(imgName + "off.src");
      document[imgName].src= imgOff;
    }
 }