（4）事件处理——（2）在页面加载的时候执行任务（Performing tasks on page load）We have already seen how to
（4）事件处理——（2）在页面加载的时候执行任务（Performing tasks on page load）
We have already seen how to make jQuery react to the loading of a web page. The $(document).ready()event handlercan be used to fire off a function's worth of code, but there's a bit more to be said about it.
我们已经看到了如何让jquery为加载网页做出反应。$(document).ready()事件处理器可以被用来启动一段代码的函数作用，但是这里还有有一些东西需要讲一下。