Simple youtube javascript api 3 request not works -

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i've tried write simple youtube request search video youtube javascript api v3.

this source code:

<!doctype html> <html>   <head>     <script type="text/javascript">         function showresponse(response) {            var responsestring = json.stringify(response, '', 2);            document.getelementbyid('response').innerhtml += responsestring;         }         // called automatically when javascript client library loaded.        function onclientload() {           gapi.client.load('youtube', 'v3', onyoutubeapiload);        }         // called automatically when youtube api interface loaded       function onyoutubeapiload() {         // api key intended use in lesson.         gapi.client.setapikey('api_key');          search();        }         function search() {          var request = gapi.client.youtube.search.list({              part: 'snippet',              q:'u2'          });          // send request api server,         // , invoke onsearchrepsonse() response.         request.execute(onsearchresponse);     }      // called automatically response of youtube api request.     function onsearchresponse(response) {         showresponse(response);     }       </script>     <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.8.2/jquery.min.js"></script>     <script src="https://apis.google.com/js/client.js?onload=onclientload" type="text/javascript"></script> </head> <body>     <pre id="response"></pre> </body> </html>

when load page on google chrome (updated), nothing happens, page remains blank. have request api key browser apps (with referers) , copied in method gapi.client.setapikey.

anyone can me?

thanks

try example here

<!doctype html> <html>   <head>     <meta http-equiv="content-type" content="text/html; charset=utf-8"/>     <title>google ajax search api sample</title>     <script type="text/javascript" src="http://www.google.com/jsapi"></script>     <script type="text/javascript">     // how search through youtube channel aka http://www.youtube.com/members      google.load('search', '1');      function onload() {        // create search control       var searchcontrol = new google.search.searchcontrol();        // results expanded default       options = new google.search.searcheroptions();       options.setexpandmode(google.search.searchcontrol.expand_mode_open);        // create video searcher , add control       searchcontrol.addsearcher(new google.search.videosearch(), options);        // draw control onto page       searchcontrol.draw(document.getelementbyid("content"));        // search       searchcontrol.execute("u2");     }      google.setonloadcallback(onload);     </script>   </head>   <body style="font-family: arial;border: 0 none;">     <div id="content">loading...</div>   </body> </html>

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