One of the many things that can and will induce a headache instantly is working with keyboard events on the multiple browsers.  Thankfully jQuery makes things seem a whole lot easier than they actually are. here is brief example

$(document).keydown(function(event){
  switch (event.keyCode) {
   //ctrl key
      case 17:
     alert("key: ctrl");
  //overide default event action
     return false;
  }
});

Note: The keycodes may be different across browsers and overiding the event action may did not work in ie8.
For a keycode reference and test tool check out http://is.gd/2mf9A