/*   * 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(){//全选              element.prop('checked', true);          };                     this.selectNone = function(){//全不选              element.prop('checked', false);          };                     this.selectInvert = function(){//反选              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)              {                  // 引用回调函数                  return checkVal.join(",");              }else{                  return null;              }          };                     return this;      };  })(jQuery);