<!DOCTYPE html><html><head><meta charset="UTF-8"><title>Document</title><style type="text/css">a:active{/*這里點擊鼠標為何背景色沒反應，把a:active改為#A1:active才有反應或者下面的#A1給為a才有反應，為什么*/background-color: #4075b0;}#A1{float: left;display: block;background-color: #bbb;padding:16px;color: #fff;text-decoration: none;}?</style></head><body><a href="page1" id="A1">鏈接A</a><!-- <a href="step-visited.html" id="A_2">鏈接B</a> --></body></html>
問題如下:麻煩大家了
yuqingzhijie3596863
2016-10-02 16:36:03
