<input type="checkbox" id="myChk" name="asf" value="1" />Test

            <script language="javascript" type="text/javascript">...
                //
                //函数绑定：bindAsEventListener()
                //
                var CheckboxWatcher = Class.create();
                
                CheckboxWatcher.prototype = ...{
                   initialize: function(chkBox, message) ...{
                        this.chkBox = $(chkBox);
                        this.message = message;
                        //绑定点击onclick事件
                        this.chkBox.onclick = this.showMessage.bindAsEventListener(this);
                   },
                   showMessage: function(evt) ...{
                      alert(this.message + ' (' + evt.type + ')');
                   }
                };
                
                new CheckboxWatcher('myChk','message!!!!');
                //$('myChk').οnclick=function(){};  //正常情况下的事件写法
            </script>
            
            <br />
            <input type="checkbox" id="myChk2" name="asf" value="1" />Test2
            <script language="javascript" type="text/javascript">...

                //函数绑定：bind()
                //obj.getName.bind($('myChk2'));  
                //相当于从apply/call，应用某一对象的一个方法，用另一个对象替换当前对象。
                //即：应用obj的getName方法，用$('myChk2')替换当前obj对象                
                function Class()...{
                    this.name="class";
                }
                Class.prototype.getName=function()...{
                    alert(this.name);
                }
                var obj=new Class();
                //$('myChk2').οnclick=obj.getName;                 //输出asf
                //$('myChk2').οnclick=obj.getName.bind(obj);       //输出: class；或用bindAsEventListener也可以
                $('myChk2').onclick=obj.getName.bind($('myChk2')); //输出：asf
                
                //从上面代码可以看出bind/bindAsEventListener只是包装了一下apply/call方法，改变方法的调用对象。
                //如例子，你可以把obj.getName方法转化成任何对象调用，并且把方法让表单元素触发。
                //（bind和bindAsEventListener之间只是返回函数的参数不同）

            </script>
            
            
            <script language="javascript" type="text/javascript">...
                function Class1(name)...{
                    this.name=name;
                }
                Class1.prototype.getName=function()...{
                    alert(this.name);
                }
                function Class2(name)...{
                    this.name=name;
　　                this.getName=Class1.prototype.getName.bind(this); //这句话
                }
                var obj1=new Class2("yql");
                obj1.getName();  //输出yql
                
                var obj2=new Object();
                obj2.name="zkj";
                obj2.fun=Class1.prototype.getName.bind(obj2);
                obj2.fun();//输出zkj
            </script>