>>551
素人なんで、合ってるか自信ないけど
javascript:var url = location.pathname.match(/\/read.cgi\/(\w+)\/((\d+)\/)?(\d+)\//);
window.open('http://p2.2ch.net/p2/post_form.php?host=' + location.hostname + (url[3] ? '%2F' + url[1] + '&bbs='+url[3] : '&bbs=' + url[1]) + '&key=' + url[4]);