http://www.vrbo.com/icalendar/4208e2a4a23443a2a989c29ca1beec2d.ics                            <form method="post" action="https://www.holidayrentalsbyowner.com/importcalendar/importurlvrbo" name="myForm" id="myForm">
                			 <input  type="hidden" name="vrboproid" value="25219">
                             <input value="http://www.vrbo.com/icalendar/4208e2a4a23443a2a989c29ca1beec2d.ics" name="vrbourl" id="vrbourl" type="hidden">
                			 <input type="submit" class="login_btn" name="importvrbo" value="Sync Now" required=""  style="display:none" > 
                			 </form>
                			 
                			 <script type="text/javascript">
    window.onload=function(){
        var auto = setTimeout(function(){ autoRefresh(); }, 100);

        function submitform(){
          //alert('test');
          document.forms["myForm"].submit();
        }

        function autoRefresh(){
           clearTimeout(auto);
           auto = setTimeout(function(){ submitform(); autoRefresh(); }, 10000);
        }
    }
</script>