bName = navigator.appName;
    bVer = parseInt(navigator.appVersion);
    br = "";

    if (bName == "Netscape" && bVer == 4) br = "n4";
      else if (bName == "Netscape" && bVer >= 4) br = "n6";
      else if (bName == "Netscape" && bVer == 3) br = "n3";
      else if (bName == "Microsoft Internet Explorer" && bVer >=4 )
          br = "e4";
      else if (bName == "Microsoft Internet Explorer") br = "e3";
      else br = "n2";

    if (br == "n4") {document.writeln('<link rel="stylesheet" type="text/css" href="/styles/main_form_ns4.css">')}
    if (br == "n6") {document.writeln('<link rel="stylesheet" type="text/css" href="/styles/main_form.css">')}
    else if (br == "e4") {document.writeln('<link rel="stylesheet" type="text/css" href="/styles/main_form.css">')}
    else if (br == "n3") {document.writeln('<link rel="stylesheet" type="text/css" href="/styles/main_form.css">')}