如下

即Safari/Chrome没有完全支持click方法。click方法写进了HTML5草案，相信不久的将来Safari/Chrome也会支持。

需要注意的Firefox5之前的版本并不是所有元素都支持click方法，从w3help当时测试结果即可看出。

Mozilla官方也有以下一段话

Prior to Gecko 5.0 (Firefox 5.0 / Thunderbird 5.0 / SeaMonkey 2.2), Gecko didn't implement the click method on other elements that might be expected to respond to mouse–clicks such as links (A elements), nor will it necessarily fire the click event of other elements. However, now it is supported by all elements, as required byHTML5.

虽然Firefox5现在对所有元素都添加了click方法，仍需注意它的click方法触发不了A的默认行为。IE/Opera却可以。