Get ID from URL with jQuery

Get a substring after the last index of /.

var url = 'http://www.site.com/234234234';
var id = url.substring(url.lastIndexOf('/') + 1);
alert(id); // 234234234

It's just basic JavaScript, no jQuery involved.

var url = window.location.pathname;
var id = url.substring(url.lastIndexOf('/') + 1);