$(document).ready(function() {

  $('#image_photo').click(function(event){
    event.preventDefault();
  });

  $('#image_photo').uploadify({
    uploader : '/uploadify/uploadify.swf',
    cancelImg : '/uploadify/cancel.png',
    multi : true,
    auto : true,
    script : '/images',
    onComplete : function(event, queueID, fileObj, response, data) {
      var dat = eval('(' + response + ')');
      $.getScript(dat.upload);},
    scriptData : {
          '_http_accept': 'application/javascript',
          'format' : 'json',
          '_method': 'post',
          '<%= session_key %>' : encodeURIComponent('<%= u cookies[session_key] %>'),
          'authenticity_token': encodeURIComponent('<%= u form_authenticity_token %>'),
          'crane_id' : '<%= @crane.id %>'
        }
  });

  $('#image_submit').click(function(event){
      event.preventDefault();
      $('#image_photo').uploadifyUpload();
    });

});


Flash object that is showing in html -


<object id="image_photoUploader" width="110" height="30" type="application/x-shockwave-flash" data="/uploadify/uploadify.swf" style="visibility: visible;">
<param name="quality" value="high">
<param name="wmode" value="opaque">
<param name="flashvars" value="uploadifyID=image_photo&pagepath=/cranes/&script=/images&folder=&scriptData=_http_accept%3Dapplication/javascript%26format%3Djson%26_method%3Dpost%26_rspec_app_session%3DBAh7B0kiD3Nlc3Npb25faWQGOgZFRkkiJTFjYzkzMWE0NTI4Yzc1N2JjYzM2NzU3MmZjNzA2ZmNjBjsAVEkiEF9jc3JmX3Rva2VuBjsARkkiMTdCalpYTUJGSWovdXdHcnRNaE1BUGdiRi9ZdEUxaFk4Z05ucmp0VnFBVTQ9BjsARg%25253D%25253D--ce163f5cd1d0882bb8a7c4d7d543314b567897d2%26authenticity_token%3D7BjZXMBFIj%25252FuwGrtMhMAPgbF%25252FYtE1hY8gNnrjtVqAU4%25253D%26crane_id%3D3&width=110&height=30&wmode=opaque&method=POST&queueSizeLimit=999&simUploadLimit=1&multi=true&auto=true&fileDataName=Filedata">
<param name="allowScriptAccess" value="always">
<param name="allowFullScreen" value="true">
<param name="AllowNetworking" value="all">
</object>