[Aetae]

var a = document.createElement('a');
a.href = 'http://javascript.ru:999/forum/offtopic/37857-regulyarnye-vyrazheniya-golovnogo-mozga.html?neko#nya';
alert([
        'protocol: ' + a.protocol,
        'hostname: ' + a.hostname,
        'host: ' + a.host,
        'port: ' + a.port,
        'pathname: ' + a.pathname,
        'search: ' + a.search,
        'hash: ' + a.hash
].join('\n'))

upd: опоздал чутка.