- <script type="text/javascript">
- var ip='20.255.255.255';
- re=/^(\d{1,2}|1\d\d|2[0-4]\d|25[0-5])\.(\d{1,2}|1\d\d|2[0-4]\d|25[0-5])\.(\d{1,2}|1\d\d|2[0-4]\d|25[0-5])\.(\d{1,2}|1\d\d|2[0-4]\d|25[0-5])$/
- r=re.test(ip);
- alert(r)
- </script>
来源: http://www.phpxs.com/code/1003898/