Regex Masters: Please inspect this regex- Pulling urls out of page

I'm putting together a regex to pull all of the urls out of a web page. Not the href tag, but just the url part of that tag. Here's what I've come up with: preg_match_all('/<.*href\s*=\s*(\"|\')?(.*?)(\s|\"|\'|>)/i', $html, $matches); foreach($matches[2] as $m) print "<P>$m\n"; All regex masters please tell me if I'm missing something. It's working well, but I'm still learning about perl regex and I'd like any input if at all possible. What's a good way to exclude things like javascript: urls and other non URI info? I guess what I'm really looking for is all the http urls, no ftp, mms etc... or anything like that. If it's right, then hopefully someone can use it! Matt Friedman