Javascript keycode clash: “right arrow” and “single quote”

Question

The following script does what it should, that is, it reacts on the keys \"arrow left\" and \"arrow right\". However, due to a keycode clash, it reacts on a single quote as

Answer 1

Use keydown instread of keypress

jS:

document.onkeydown=function(event){
  if(window.event) event=window.event;
  var keycode=(event.keyCode)?event.keyCode:event.which;
  switch(keycode){
    case 37: alert("an arrow");
      break;
    case 39: alert("another arrow");
      break;
  }
}

Fiddle : http://jsfiddle.net/p9x1Lj4u/2/