function writeDocStyle() 
{
  var browser=navigator.appName;
  var b_version=navigator.appVersion;
  var version=parseFloat(b_version);
  
  if (browser == "Netscape" || 
      browser == "Mozilla") {
    document.writeln('<link rel=\"stylesheet\" href=\"/style_mozilla.css\">');
  } else {
    document.writeln('<link rel=\"stylesheet\" href=\"/style_ie.css\">');
  }  
}