一、谈谈对this对象的理解this ，函数执行的上下文，总是指向函数的直接调用者（而非间接调用者），可以通过 apply ， call ， bind 改变 this 的指向。如果有 new 关键字，this 指向 new 出来的那个对象。在事件中，this 指向触发这个事件的对象，特殊的是，IE 中的 attachEvent 中的 this 总是指向全局对象 window 。对于匿名函数或者直....

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