jquery data-async attribute support

data-async.js

$(function () {

  $('*[data-async="true"]').each(function () {
    var self = $(this);
    if (self.data('handled') != null) return;
    var events = self.data('events') || 'click';
    self.bind(events, function (e) {
      var preventDefault = self.data('prevent-default');
      if (preventDefault == 'true') e.preventDefault();
      var confirmMessage = self.data('confirm');
      if (confirmMessage != null && !confirm(confirmMessage)) return;
      var params = {};
      params.method = self.data('method') || 'post';
      params.url = self.data('url');
      params.cache = self.data('cache');
      params.success = function (data) {
        var target = self.data('target');
        if (target != null) $('#' + target).html(data);
        var callback = self.data('callback');
        if (callback != null) window[callback](data);
      }
      var asyncData = self.data('parameters');
      if (asyncData != null) {
        var evalFunction = "(function(self) { return "+ asyncData +" })";
        params.data = eval(evalFunction)(self);
      }
      $.ajax(params);
    });
    self.attr('data-handled', 'true');
  });

});