CodesJava

Easy learning with example program codes

JavaScript IP address validation

IP address validation in JavaScript is used to insure that number entered in the specified IP address field should be a valid IP address.
Regular Expression:

/^(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)
\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$/

Example

<!DOCTYPE html>
<html lang="en">
<head>
<script> 
function ipAddressCheck(ipAddress)
{
   var regEx = /^(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)
\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$/;
   if(ipAddress.value.match(regEx))
     {
      return true;
     }
   else
     {
     alert("Please enter a valid ip Address.");
     return false;
     }
}    
</script> 
</head>
<body>
<div class="mail">
<h2>JavaScript IP Address Validation</h2>
<form name="form1" action="#"> 
IP Address: <input type='text' name='ipAddress'/></br></br>
<input type="submit" name="submit" value="Submit" 
onclick="ipAddressCheck(document.form1.ipAddress)"/>
</form>
</div>
</body>
</html>
Please follow and like us:
error








Copyright © 2019 CodesJava DMCA.com Protection Status