title: from_remote_tag sent request http post instead of ajax XMLHTTP request
body: <p>I define a submit button with form_remote_tag, </p>
  
  <pre><code>  &lt;div class="form_row"&gt;
  &lt;% form_remote_tag :url =&gt; {:controller =&gt; '/group', :action =&gt; 'addgroup'}, :update =&gt; 'activitypage' do %&gt;
   &lt;%= submit_tag "Add!", :class =&gt; "submit" %&gt;
  &lt;% end %&gt;
  </code></pre>
  
  <p></p>
  
  <p>I used fiddler and confirm the rails code was translated into ajax request,</p>
  
  <pre><code>u003Cform action=\"/group/addgroup\" method=\"post\" onsubmit=\"new Ajax.Request('/group/addgroup', {asynchronous:true, evalScripts:true, parameters:Form.serialize(this)}); return false;\"\u003E\n     \u003Cinput class=\"submit\" name=\"commit\" type=\"submit\" value=\"Add!\" /\u003E\n  \u003C/form\u003E\n  \u003C/div\u003E\n\u003C/fieldset\u003E  \n\u003C/form\u003E\n");
  </code></pre>
  
  <p>$("activitypage").visualEffect("highlight");</p>
  
  <p>however, when I clicked the button, the client (IE 8) browser actually sent out a http post request (see below) instead of XMLHTTPRequest, thus my javascript reponse was declined. Any idea? Thanks in advance.</p>
  
  <pre><code>POST http://192.168.1.31:3000/group/addgroup HTTP/1.1
  </code></pre>
  
  <p>Accept: image/gif, image/jpeg, image/pjpeg, image/pjpeg, application/x-shockwave-flash, application/vnd.ms-powerpoint, application/vnd.ms-excel, application/msword, application/x-ms-application, application/x-ms-xbap, application/vnd.ms-xpsdocument, application/xaml+xml, application/x-silverlight, <em>/</em>
  Referer: <a href="http://192.168.1.31:3000/mywebapp" rel="nofollow noreferrer">http://192.168.1.31:3000/mywebapp</a>
  Accept-Language: en-us
  User-Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; GTB6.5; .NET CLR 1.0.3705; .NET CLR 2.0.50727; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729)
  Content-Type: application/x-www-form-urlencoded
  Accept-Encoding: gzip, deflate
  Host: 192.168.1.31:3000
  Content-Length: 84
  Connection: Keep-Alive
  Pragma: no-cache
  Cookie: remember_me=1; _session_id=2ba880449df83115d15bab29b3c8ab30; authorization_token=6419794165b8169cfff54053bddb40c9f0405782</p>