REGEX: Parse URL into individual parts (JavaScript: The Good Parts)

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REGEX: Parse URL into individual parts (Javascript: The Good Parts)

<script type="text/javascript" language="javascript">
	var parse_url = /^(?:([A-Za-z]+):)?(\/{0,3})([0-9.\-A-Za-z]+)(?::(\d+))?(?:\/([^?#]*))?(?:\?([^#]*))?(?:#(.*))?$/;

	var url= "http://www.ora.com:80/goodparts?q#fragment";

	var results = parse_url.exec(url);

	var names = ['url', 'scheme', 'slash', 'host', 'port', 'path', 'query', 'hash'];

	var blanks = '      ';
	var i;

	for (i = 0; i < names.length; i += 1){
		document.writeln('<strong>' + names[i] + '</strong>: ' + 
			blanks.substring(names[i].length), results[i] + "<br />");
	}

</script>

This regular expression has a good balance between robustness and relative simplicity.
It needs to handle user:password however.