Delaying actions on keypress with jQuery

simple_method.js

$('#mySearch').keyup(function() {
  clearTimeout($.data(this, 'timer'));
  var wait = setTimeout(search, 500);
  $(this).data('timer', wait);
});

function search() {
  $.post("stuff.php", {nStr: "" + $('#mySearch').val() + ""}, function(data){
    if(data.length > 0) {
      $('#suggestions').show();
      $('#autoSuggestionsList').html(data);
    }else{
      $('#suggestions').hide();
    }
  });
}

simple_method_with_enter_support.js

$('#searchString').keyup(function(e) {
    clearTimeout($.data(this, 'timer'));
    if (e.keyCode == 13)
      search(true);
    else
      $(this).data('timer', setTimeout(search, 500));
});
function search(force) {
    var existingString = $("#searchString").val();
    if (!force && existingString.length < 3) return; //wasn't enter, not > 2 char
    $.get('/Tracker/Search/' + existingString, function(data) {
        $('div#results').html(data);
        $('#results').show();
    });
}

More informations,
http://stackoverflow.com/questions/2410937/delaying-actions-between-keypress-in-jquery
http://stackoverflow.com/questions/3028704/optimized-search-using-ajax-and-keypress