function skyad(){
if (!ns4) 
 {ShowSky();}
else 
  {ShowOther();}
}

function ShowOther(){

}




<!-- /* © 1997-2002 BURST! Media, LLC. All Rights Reserved.*/ 
function ShowSky(){
var TheAdcode = 'sk6383a'; 
var bN = navigator.appName; 
var bV = parseInt(navigator.appVersion); 
var base='http://www.burstnet.com/'; 
var Tv=''; 
var backColor='FFFFFF';
var fontColor='000000';
var agt=navigator.userAgent.toLowerCase(); 
if (bV>=4) 
  {ts=window.location.pathname+window.location.search; 
   i=0; Tv=0; while (i< ts.length) 
      { Tv=Tv+ts.charCodeAt(i); i=i+1; } Tv="/"+Tv;} 
  else   {Tv=escape(window.location.pathname); 
   if( Tv.charAt(0)!='/' ) Tv="/"+Tv; 
          else if (Tv.charAt(1)=="/")
Tv=""; 
  if( Tv.charAt(Tv.length-1) == "/") 
    Tv = Tv + "_";} 

  document.write('<ifr'+'ame id=BURST src="'+base+'cgi-bin/ads/' + 
  TheAdcode + '.cgi' + Tv +  '/zg' + backColor + 'x' + fontColor + 'l' + fontColor +  
  fontColor + 'k' + fontColor + '/RETURN-CODE" width=160 height=600' + 
  'v' +'marginwidth=0 marginheight=0 hspace=0 vspace=0 ' + 
  'frameborder=0 scrolling=no>');
  document.write('</ifr'+'ame>');}