Javascript Keystroke Shortcuts

index.html

<a href="action/link/" data-shortcut="m">
    <button type="button" class="btn btn-success">Action Button</button>
</a>

keys.js

$(document).ready(function(){
  /*
   * Data-shortcut Shorthand key-combinations for URL's
   */
  var shortHands = [];

  $.each($('a[data-shortcut]'), function(key, elem){
      var shortcut = $(elem).attr('data-shortcut');
      shortHands.push({
          key : shortcut,
          action : $(elem).prop('href')
      });
      if( $(elem).find('button').length > 0 ){
          var button = $(elem).find('button')[0];
          $(button).html( $(button).html().replace(new RegExp(shortcut, "i"), function(match){
              return "<u>" + match + "</u>";
          }) );
      } else{
          $(elem).html( $(elem).html().replace(new RegExp(shortcut, "i"), function(match){
              return "<u>" + match + "</u>";
          }) );
      }
  });

  $(window).keydown(function (e){
      if( e.metaKey ){
          var code = e.keyCode || e.which;
          var pressedKey = String.fromCharCode(code);

          var foundAction = false;

          $.each(shortHands, function(key, obj){
              if( obj.key.toLowerCase() == pressedKey.toLowerCase() ){
                  e.preventDefault();
                  window.open(obj.action, '_self');
                  return false;
              }
          });

      }
  });
});