jquery 全反選實現插件

/*


selectToDo - jQuery plugin for select checkbox
*
Copyright (c) 2014 Elric Huang
*
Licensed under the MIT license:
http://www.opensource.org/licenses/mit-license.php
*
Project home:
https://github.com/elrichuang/jquery.selectToDo.js
*
Version:  0.1.3
/
;(function ($){
 $.fn.selectToDo = function (options){

 var settings = $.extend({},{
     "selectAllButton"    : $("#selectAll"),
     "selectNoneButton"   : $("#selectNone"),
     "selectInvertButton" : $("#selectInv"),
 }, options);

 var element = this;

 $(settings.selectAllButton).bind("click",function(){
     element.selectAll();
 });
 $(settings.selectNoneButton).bind("click",function(){
     element.selectNone();
 });
 $(settings.selectInvertButton).bind("click",function(){
     element.selectInvert();
 });

 this.selectAll = function(){//全選
     element.prop('checked', true);
 };

 this.selectNone = function(){//全不選
     element.prop('checked', false);
 };

 this.selectInvert = function(){//反選
     element.each(function(){
         if(this.checked){
             $(this).prop('checked', false);
         }else{
             $(this).prop('checked', true);
         }
     });
 };

 this.result = function(){
     var checkVal=[];
     element.each(function(){
         if(this.checked){
             checkVal.push($(this).val());
         }
     });
     if(checkVal.length > 0)
     {
         // 引用回調函數
         return checkVal.join(",");
     }else{
         return null;
     }
 };

 return this;

};
})(jQuery);</pre>