Left/Right arrow key press

HTML

<div class="full-size-image-nav">
    <%if previousNumber <> 0 then%>
        <div class="previous">
            <p><a onclick="alert('Left arrow key');">Left click - Google</a></p>
        </div>
    <%end if%>
    <%if nextNumber <> 0 then%>
        <div class="next">
            <p><a onclick="alert('Right arrow key');">Right Click - Yahoo</a></p>
        </div>
    <%end if%>
</div>

JavaScript

$("body").keydown(function(e) {
  if(e.which == 37) { // left     
      $(".previous a").trigger("click");
  }
  else if(e.which == 39) { // right     
      $(".next a").trigger("click");
  }
});