<script language="JavaScipt">
<!--
function iponly (address) {
var ipDomainPat=/^(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})$/;
var IPArray=address.match(ipDomainPat);
if (IPArray!=null)
{for (var i=1;i<=4;i++)
{if (IPArray[i]>255)
{alert("IP地址输入不正确!");
return false;}
}
return true;}
else
{alert("IP地址输入不正确!");
return false;}
//-->
<!--
function iponly (address) {
var ipDomainPat=/^(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})$/;
var IPArray=address.match(ipDomainPat);
if (IPArray!=null)
{for (var i=1;i<=4;i++)
{if (IPArray[i]>255)
{alert("IP地址输入不正确!");
return false;}
}
return true;}
else
{alert("IP地址输入不正确!");
return false;}
//-->
function isip(s){
var check=function(v){try{return (v<=255 && v>=0)}catch(x){return false}};
var re=s.split(".")
return (re.length==4)?(check(re[0]) && check(re[1]) && check(re[2]) && check(re[3])):false
}var s="202.197.78.129";
alert(isip(s))
</SCRIPT>