IP address regex validation in javascript code example

Example 1: regex for ip address javascript

^((25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$
               //validate

Example 2: regex for ip address javascript

var ipRegex = new RegExp("^(([1-9]?\\d|1\\d\\d|2[0-5][0-5]|2[0-4]\\d)\\.){3}([1-9]?\\d|1\\d\\d|2[0-5][0-5]|2[0-4]\\d)$");
//0.0.0.0 to 255.255.255.255