key events with jQuery.

key_events_with_jquery.js

$(document).ready(function(){
  $(document).keydown(function(event){
    switch(event.which){
      case 13:
        alert("enter");
        break;
      case 39:
        alert("right-arrow");
        break;
      case 37:
        alert("left-arrow");
        break;
    }
  });
});