jquery.delegate.js

(function() {

  // jQuery(context).delegate(selector, types, fn)
  // jQuery(context).delegate(selector, types, data, fn)
  // jQuery(context).delegate(selector, {type: fn})
  var delegate = jQuery.fn.delegate;
  jQuery.fn.delegate = function(selector, types, data, fn){
    if (jQuery.isPlainObject(types)){
      for (var type in types) delegate.call(this, selector, type, undefined, types[type]);
    }else{
      delegate.call(this, selector, types, data, fn)
    }
    return this;
  }

  // jQuery(context).undelegate(selector, types, fn)
  // jQuery(context).undelegate(selector, {type: fn})
  var undelegate = jQuery.fn.delegate;
  jQuery.fn.undelegate = function(selector, types, fn){
    if (jQuery.isPlainObject(types)){
      for (var type in types) delegate.call(this, selector, type, types[type]);
    }else{
      undelegate.call(this, selector, types, fn)
    }
    return this;
  }

})();