<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML> <HEAD> <TITLE> 检查是否为IP地址</TITLE> <META NAME="Generator" CONTENT="EditPlus"> <META NAME="Author" CONTENT=""> <META NAME="Keywords" CONTENT=""> <META NAME="Description" CONTENT=""> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> </HEAD> <BODY> <title>IP地址合法性验证js代码 - </title> 请输入IP地址：<input type="text" id="ip"> <input type="button" οnclick="checkIP()" value="验证"> </BODY> </HTML> <script language="javascript"> function checkIP() { obj = document.getElementById("ip").value; //ip地址 var exp=/^(\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])$/; var reg = obj.match(exp); if(reg==null) { alert("IP地址不合法！"); } else { alert("IP地址合法！"); } } </script>
转载于:https://www.cnblogs.com/gongyuit/p/5485921.html
