<html> <body><script language="javascript" type="text/javascript"> function test() { var vIP=document.getElementById("ip").value; var vReg=new RegExp("^(\\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]|\\*)$")
<body><script language="javascript" type="text/javascript">
function test()
{
var vIP=document.getElementById("ip").value;
var vReg=new RegExp("^(\\d{1,2}|1\\d\\d|2[0-4]\\d|25[0-5])\\.(\\d{1,2}|1\\d\\d|2[0-4]\\d|25[0-5])\\.(\\d{1,2}|1\\d\\d|2[0-4]\\d|25[0-5])\\.(\\d{1,2}|1\\d\\d|2[0-4]\\d|25[0-5]|\\*)$")
alert(vReg.test(vIP));
}
</script>
<input type="text" maxlength="15" style="width:150px;" id="ip"/>
<input type="button" onclick="test()" value="checkIP" /></body>
</html>
合法格式:[0-255].[0-255].[0-255].[0-255][0-255].[0-255].[0-255].*0.0.0.0
1.1.1.1
1.1.1.*