// Anonymous function wrapper to keep namespace safe. (function() { var Survey = {}; var old_domain = document.domain; /** Static method to create a survey. */ Survey.open = function(survey_id, user_token, return_page) { Survey.add_page_mask(); var survey_url = "http://youtube-survey.appspot.com/answer?s=" + survey_id + "&session_id=" + user_token + "&next=" + return_page; Survey.create_survey_frame(survey_url); window.scroll(0, 0); if (window.location.href.indexOf('youtube.com') > -1) { document.domain = 'youtube.com'; } else { document.domain = 'google.com'; } }; var mask_frame = null; /** Cover the page with a partially-transparent iframe. */ Survey.add_page_mask = function() { mask_frame = document.createElement('iframe'); mask_frame.setAttribute('id', 'mask_frame'); mask_frame.setAttribute('name', 'mask_frame'); mask_frame.frameBorder = '0'; mask_frame.allowTransparency = true; mask_frame.style.border = '0px'; mask_frame.style.width = '100%'; var height = document.body.clientHeight || document.documentElement.scrollHeight; // hackery height++; mask_frame.style.height = height ? height + "px" : '100%'; mask_frame.style.zIndex = '1000'; mask_frame.style.background = '#333'; mask_frame.style.opacity = '0.4'; mask_frame.style.filter = 'alpha(opacity=40)'; mask_frame.style.position = 'absolute'; mask_frame.style.top = '0'; mask_frame.style.left = '0'; document.body.appendChild(mask_frame); mask_frame.contentWindow.document.write(''); mask_frame.contentWindow.document.close(); }; var survey_frame = null; /** Opens a centered iframe with the given url */ Survey.create_survey_frame = function(url) { survey_frame = document.createElement('iframe'); survey_frame.src = url; survey_frame.frameBorder = '0'; survey_frame.allowTransparency = true; survey_frame.style.border = '0'; survey_frame.style.zIndex = '1001'; survey_frame.style.position = 'absolute'; survey_frame.style.left = (document.body.clientWidth - 620) / 2 + 'px'; survey_frame.style.top = '100px'; survey_frame.style.width = '640px'; survey_frame.style.backgroundColor = 'transparent'; var windowHeight = window.innerHeight ? window.innerHeight : document.documentElement.clientHeight; survey_frame.style.height = (windowHeight - 200) + 'px'; document.body.appendChild(survey_frame); }; /** Closes the survey (when completed) */ Survey.close_survey = function() { mask_frame.style.display = "none"; survey_frame.style.display = "none"; if (document.getElementById('survey_link')) { document.getElementById('survey_link').style.display = 'none'; } document.domain = old_domain; }; window.Survey = Survey; })();