为什么我取不到这个呢
var list=outer.getElementsByTagName('li');这句有问题是怎么回事Uncaught TypeError: Cannot read property 'getElementsByTagName' of null
var list=outer.getElementsByTagName('li');这句有问题是怎么回事Uncaught TypeError: Cannot read property 'getElementsByTagName' of null
2015-08-14
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