当iframe在jQuery中加载完成后，如何触发事件？
问题描述：
我必须在页面中加载PDF。
I have to load a PDF within a page.
理想情况下，我希望有一个加载动画gif，一旦PDF加载就会被替换。
Ideally I would like to have a loading animated gif which is replaced once the PDF has loaded.
答
我很确定无法完成。
相当多除PDF之外的其他任何东西，甚至是Flash。 （在Safari，Firefox 3，IE 7上测试）
Pretty much anything else than PDF works, even Flash. (Tested on Safari, Firefox 3, IE 7)
太糟糕了。