Thread: jquery in zkoss http request

Hey maybe can help find the problem in my function? I want get from url info and post after textbox.
expected result is text from ulr. I just do not get the error message I click execute but nothing happens.

<window title="test" border="normal">
<vlayout>
<textbox w:onOK="httpGet()" xmlns:w="client"/>
    <textbox id="opa"/>
</vlayout>
<script><![CDATA[
 
 
function httpGet()
  {
 
    xmlhttp=new XMLHttpRequest();
 
  xmlhttp.onreadystatechange=function()
    {
      document.getElementById("opa").innerHTML=xmlhttp.responseText;
    }
  xmlhttp.open("GET", "http://stackoverflow.com/questions/20281856/jquery-in-zkoss-http-request", true);
  }
]]></script>
</window>