function responseIsEmpty(nomCookie, form)
{
  var radioLenth = form.reponse;
  var value = false;
  for(var i=0; i< radioLenth.length; i++){
    if(radioLenth[i].checked)
     {
	         value = true;
	 }
 }
   if(!value)
     alert("Vous avez omis de voter!");
   else
     value = getCookieTVA(nomCookie, form.elements['count'].value);
   return value;
}

function readCookie (cookieName)
{
    if(document.cookie)
    {
       index = document.cookie.indexOf(cookieName)
       if (index != -1)
       {
           cookieStart = (document.cookie.indexOf("=", index) + 1)
           cookieStop = document.cookie.indexOf(";", index)
           if (cookieStop == -1)
           {
              cookieStop = document.cookie.length
           }

		   return unescape(document.cookie.substring(cookieStart, cookieStop));
       }
    }
    return null;
}

function getCookieTVA(cookieName, version_cookie)
{
   var presentDay = new Date();
   var valcookie = readCookie (cookieName);
   var version = version_cookie;
   incCookie(cookieName, valcookie, version);
   if (valcookie == (presentDay.getDate() + version))
   {
       alert('Une seule participation par question est permise. Merci d\'avoir participé au sondage.')
       return false
   }
   else
   {
       return true 
   }
}

function incCookie(cookieName, valcookie, version)
{
   var windowprops = "width=400,height=370,location=no,toolbar=no,menubar=no,scrollbars=no,resizable=yes";
   var presentDay = new Date();

   if (valcookie)
   {
      valcookie = presentDay.getDate() + version;
   }
   else
   {
      valcookie = presentDay.getDate() + version;
   }
   document.cookie=cookieName + "=" + escape(valcookie) + "; expires=Tuesday, 01-JAN-2100 08:00:00 GMT"
}