Javascript闭包和'这个'

我有一个问题,我创建的对象看起来像这样:

var myObject = {

    AddChildRowEvents: function(row, p2) {
        if(document.attachEvent) {
            row.attachEvent('onclick', function(){this.DoSomething();});
        } else {
            row.addEventListener('click', function(){this.DoSomething();}, false);
        }
    },

    DoSomething: function() {
        this.SomethingElse(); //<-- Error here, object 'this' does not support this method.
    }
}

问题是当我进入'DoSomething'函数时,'this'不会引用'myObject'我做错了什么？

当函数被调用时,"this"指的是行.如果你想拥有这个对象,你可以这样做:]

AddChildRowEvents: function(row, p2) {
    var theObj = this;
    if(document.attachEvent) {
         row.attachEvent('onclick', function(){theObj.DoSomething();});
    } else {
         row.addEventListener('click', function(){theObj.DoSomething();}, false);
    }
},

调用该函数时,它可以访问定义函数时在范围内的变量theobj.

this总是指内部函数,如果你有嵌套函数,你必须创建另一个变量并指向它this.

var myObject = {
    AddChildRowEvents: function(row, p2) {
        var that = this;
        if(document.attachEvent) {
            row.attachEvent('onclick', function(){that.DoSomething();});
        } else {
            row.addEventListener('click', function(){that.DoSomething();}, false);
        }
    }
}