javascript将ip地址第四段用星号代替的两种方法

　　第一种：用查找字符串的方法

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<title>ip地址第四段用星号代替的方法</title> 
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<img src="/_New/_cj/myeditor/sysimage/space.gif" class="ewebeditor__script" _ewebeditor_fake_tag="script" _ewebeditor_fake_value="%3Cscript%20language%3D%22javascript%22%3E%20%0D%0Avar%20ip%3D%22192.168.10.192%22%3B%20%0D%0Avar%20a%3Dip.lastIndexOf(%22.%22)%3B%20%2F%2F%E9%A6%96%E5%85%88%EF%BC%8C%E7%94%B1lastIndexOf%E6%96%B9%E6%B3%95%E5%8F%96%E5%BE%97%E5%80%92%E6%95%B0%E7%AC%AC%E4%B8%80%E4%B8%AA.%E6%89%80%E5%9C%A8%E7%9A%84%E4%BD%8D%E7%BD%AE%20%0D%0Avar%20b%3Dip.substr(0%2Ca)%3B%20%2F%2F%E5%85%B6%E6%AC%A1%EF%BC%8C%E7%94%B1substr%E6%96%B9%E6%B3%95%E5%8F%96%E5%BE%970%E4%BD%8D%E5%88%B0%E7%AC%AC%E4%B8%89%E4%B8%AA%E7%82%B9%E7%9A%84%E5%AD%90%E5%AD%97%E7%AC%A6%E4%B8%B2%20%0D%0Aalert(%22%E6%82%A8%E7%9A%84ip%E6%98%AF%22%2Bb%2B%22.*%22)%3B%20%2F%2F%E7%AC%AC%E4%B8%89%EF%BC%8C%E4%BB%A5%E7%AC%AC%E4%B8%89%E6%AE%B5%E4%B8%BA%E6%98%9F%E5%8F%B7%E7%9A%84%E6%96%B9%E5%BC%8F%E8%BE%93%E5%87%BA%E3%80%82%20%0D%0A%3C%2Fscript%3E"> 
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　　 [Ctrl+A 全选注:如需引入外部Js需刷新才能执行]

　　第二种：用数组的方法

　　 [Ctrl+A 全选注:如需引入外部Js需刷新才能执行]

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