<html>
<head>
<script language="JavaScript">
<!-- Hide
/*
*/
function validIp(ipstr)
{
//var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/;
alert(ipstr);
var IpPat=/^(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})$/;
var IPArray=ipstr.match(IpPat);
if (IPArray!=null)
{ // this is an IP address
for (var i=1;i<=4;i++)
{
if (IPArray[i]>255)
{
alert(" IP address is invalid!");
return false;
}
}
}else{
alert("IP address is invalid2!");
return false;
}}
// -->
</script>
</head><body>
<form name=emailform onSubmit="validIp(this.ipaddr.value);return false;">
Your IP Address: <input type=text name="ipaddr"><br> <input type=submit value="Submit">
</form>
<head>
<script language="JavaScript">
<!-- Hide
/*
*/
function validIp(ipstr)
{
//var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/;
alert(ipstr);
var IpPat=/^(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})$/;
var IPArray=ipstr.match(IpPat);
if (IPArray!=null)
{ // this is an IP address
for (var i=1;i<=4;i++)
{
if (IPArray[i]>255)
{
alert(" IP address is invalid!");
return false;
}
}
}else{
alert("IP address is invalid2!");
return false;
}}
// -->
</script>
</head><body>
<form name=emailform onSubmit="validIp(this.ipaddr.value);return false;">
Your IP Address: <input type=text name="ipaddr"><br> <input type=submit value="Submit">
</form>
<head>
<script language="JavaScript">
<!-- Hide
/*
*/
function validIp(ipstr)
{
//var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/;
var IpPat=new RegExp("^([0-9]{1,3})\.([0-9]{1,3})\.([0-9]{1,3})\.([0-9]{1,3})$");
var IPArray=ipstr.match(IpPat);
if (IPArray!=null)
{ // this is an IP address
for (var i=1;i<=4;i++)
{
if (IPArray[i]>255)
{
alert(" IP address is invalid!");
return false;
}
}
}else{
alert("IP address is invalid2!");
return false;
}}
// -->
</script>
</head><body>
<form name=emailform onSubmit="return validIp(this.ipaddr.value);">
Your IP Address: <input type=text name="ipaddr"><br> <input type=submit value="Submit">
</form>
=>
[0-9]
或者
\\d
因为在引号中\是转义符,所以需要\\表示\,如下<html>
<head>
<script language="JavaScript">
<!-- Hide
/*
*/
function validIp(ipstr)
{
//var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/;
var IpPat=new RegExp("^(\\d{1,3})\.(\\d{1,3})\.(\\d{1,3})\.(\\d{1,3})$");
var IPArray=ipstr.match(IpPat);
if (IPArray!=null)
{ // this is an IP address
for (var i=1;i<=4;i++)
{
if (IPArray[i]>255)
{
alert(" IP address is invalid!");
return false;
}
}
}else{
alert("IP address is invalid2!");
return false;
}}
// -->
</script>
</head><body>
<form name=emailform onSubmit="return validIp(this.ipaddr.value);">
Your IP Address: <input type=text name="ipaddr"><br> <input type=submit value="Submit">
</form>
我以前在windows 下开发,现在跑道unix下面很多东西不懂。这就是我在写脚本时遇到的问题。