function Getbitly() {

	 api = 'http://rdream.hostns.jp/js/twitlib.php' 
        + '?version=2.0.1&format=json'
        + '&callback=Callback&longUrl=';
	    var script = document.createElement('script');
	    script.type = 'text/javascript';
	    script.src = api + encodeURIComponent(location.href) ;
	    document.body.appendChild(script);
}


function Callback(json) {
var bitly_url=json.results[location.href]['shortUrl'];
var open_url
		
if ( bitly_url.indexOf("/bit.ly/") == -1 ) {
		open_url='http://twitter.com/home/?status=RT @rdreamcom '+encodeURIComponent(document.title+' ' + location.href) + '%20%23rdream%20 ';
		window.open(open_url);
    }else{
		open_url='http://twitter.com/home/?status=RT @rdreamcom '+encodeURIComponent(document.title+' ' + bitly_url) + '%20%23rdream%20 ';
		window.open(open_url);
    }
}