js function to get filename from url

Question

I have a url like http://www.example.com/blah/th.html

I need a javascript function to give me the \'th\' value from that.

All my urls have the same format (2

Answer 1

I'd use the substring function combined with lastIndexOf. This will allow for filenames with periods in them e.g. given http://example.com/file.name.txt this gives file.name unlike the accepted answer that would give file.

function GetFilename(url)
{
    if (url)
    {
        return url.substring(url.lastIndexOf("/") + 1, url.lastIndexOf("."));
    }
    return "";
}