challenge

academia-edu.js

<a href="#" class="save_to_academia_bookmarks">Save to Academia Bookmarks</a>
<script type="text/javascript">
  window.Academia = window.Academia || {};
  (function(a){
    // the load event handler for the iframe
    a.iframe_loaded = function(e) { console.log(e); }
        
    // the click event handler for 
    a.a_links = document.getElementsByClassName("save_to_academia_bookmarks");
    for (i = 0; i < a.a_links.length; i++) {
      a.a_links[i].onclick = function(e){
        // remove old occurrences of iframe
        try{ document.body.removeChild(document.getElementById("academia_iframe")); }catch(x){}

        // create the iframe
        a.iframe = document.createElement("iframe");
        a.iframe.id = "academia_iframe";
        a.iframe.style.display = "none";
        document.body.appendChild(a.iframe);
        a.iframe.addEventListener("load",  function(e){ a.iframe_loaded(e) }, true);

        // create the form
        var iframe_doc = a.iframe.contentWindow.document;
        iframe_doc.open();
        iframe_doc.write('<form method="POST" action="http://bookmarking-application.com/bookmarks">');
        iframe_doc.write('<input type="hidden" name="url" value="'+window.location.href+'">');    
        iframe_doc.write('</form>');
        iframe_doc.close();

        a.iframe.contentWindow.document.forms[0].submit();        
        return false;
      }
    }
  
  })(Academia);
</script>