JS 正则表达式验证 IP
Javascript正则表达式验证IP
?
<script language=javascript>
function check()
{
?
//alert("IP地址输入非法!");
var pattern=/^(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9])\.(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9]|0)\.(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9]|0)\.(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[0-9])$/;
flag_ip=pattern.test(document.all.ip.value);
if(!flag_ip)
{
alert("IP地址输入非法!");
document.all.ip.focus();
return false;
}
}
</script>
<form onsubmit="return check()">
? ? <input name="ip" type="text" /> <input type="submit" value="Submit Query" />
</form>
