function errmsg(msg, url, line) {
  var txt;
  txt = "Javascript error has occurred\n";
  txt += "Error message: " + msg + "\n";
  txt += "URL: " + url + "\n";
  txt += "Line #: " + line ;
  //alert(txt);
  //return true;
  return false;
}


window.onerror=errmsg;



function build_music_menu(menu_num) {

  var title     = ["Printed Music", "Bach", "Jenkins Fantasias", "Manchester Viol Book", "Teach Your Neighbor"];
  var link      = ["music_1.html", "music_6.html", "music_3.html", "music_4.html", "music_5.html"]; 
  var n_items = title.length;
  var item_num;
  var class1, class2, class3;
  document.writeln();
  document.writeln('      <div id="top_menu_background_1">');
  document.writeln('        <ul class="top_menu_right">');
  for (item_num=n_items-1; item_num>=0; item_num--) {
    class1 = "";
    class2 = "";
    if (item_num === n_items-1) {class1 = "rmi";}
    if (menu_num === item_num)  {class2 = "tmSelected";}
    class3 = class1 + ' ' + class2;
    if (class3.length > 1) {class3 = "class=\"" + class3 + "\"";}
    document.writeln('            <li ' + class3 +   '><a  '  + ' href="' + link[item_num] + '">' +
      title[item_num] +   '</a></li>');
  }
  document.writeln('         </ul>  <!-- end of top_menu -->');
  document.writeln('        <div style="clear:both"></div>');
  document.writeln('      </div> <!-- end top_menu_background_2 -->');
} // end build_prof_menu