function hlight() {
   var os=new Array(2);
   os=getOS();
   var style = 'background-color: #e0ffff; font-weight: bold;';
   var vlc = document.getElementById('vlc');
   switch(os[0]) {
      case "macosx" :
         if (vlc) {
            var vlparent = vlc.parentNode;
            vlparent.removeChild(vlc);
            }
         var mpg = document.getElementById('mpg');
         mpg.setAttribute('style',style);
         break;
      case "win" :
         var wma = document.getElementById('wma');
         if (wma) {
            if (vlc) {
               var vlparent = vlc.parentNode;
               vlparent.removeChild(vlc);
               }
            wma.setAttribute('style',style);
            } else {
            var mpg = document.getElementById('mpg');
            mpg.setAttribute('style',style);
            }
         break;
      case "linux" :
         var ogg = document.getElementById('ogg');
         if (ogg) {
            if (vlc) {
               var vlparent = vlc.parentNode;
               vlparent.removeChild(vlc);
               }
            ogg.setAttribute('style',style);
            }
         break;
      }
   }
   
womAdd('hlight()');
womOn();