with (navigator) { nazev=appName; verze=parseInt(appVersion); }
 
 ie4=false;
 nn4=false;

with (window) {
    if (nazev=="Microsoft Internet Explorer" && verze>=4) ie4=true;
      else if (nazev=="Netscape" && verze>=4) nn4=true;
        else if (nazev=="Opera") opera=true; }

  if (ie4)
  { document.write("<link rel=\"stylesheet\" href=\"pension-css/pension-silva-ie.css\">\n"); }
  else
    { 
      if (nn4)
      { document.write("<link rel=\"stylesheet\" href=\"pension-css/pension-silva-mozilla.css\">\n"); }
      else
      {
        if (opera)
        document.write("<link rel=\"stylesheet\" href=\"pension-css/pension-silva-opera.css\">\n");
        else
        document.write("<link rel\"stylesheet\" href=\"pension-css/pension-silva-ie.css\">\n");
      }  
    }