var http_request = false;
   function makePOSTRequest(url, parameters) {
      http_request = false;
      if (window.XMLHttpRequest) { // Mozilla, Safari,...
         http_request = new XMLHttpRequest();
         if (http_request.overrideMimeType) {
         	// set type accordingly to anticipated content type
            //http_request.overrideMimeType('text/xml');
            http_request.overrideMimeType('text/html');
         }
      } else if (window.ActiveXObject) { // IE
         try {
            http_request = new ActiveXObject("Msxml2.XMLHTTP");
         } catch (e) {
            try {
               http_request = new ActiveXObject("Microsoft.XMLHTTP");
            } catch (e) {}
         }
      }
      if (!http_request) {
         alert('Cannot create XMLHTTP instance');
         return false;
      }
      
      http_request.onreadystatechange = alertContents;
      http_request.open('POST', url, true);
      http_request.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
      http_request.setRequestHeader("Content-length", parameters.length);
      http_request.setRequestHeader("Connection", "close");
      http_request.send(parameters);
   }

   function alertContents() {
      if (http_request.readyState == 4) {
         if (http_request.status == 200) {
            //alert(http_request.responseText);
            result = http_request.responseText;
            document.getElementById('myspan').innerHTML = result;            
         } else {
            alert('Äänestys ei toiminut tällä kertaa. Yritä myöhemmin uudestaan.');
         }
      }
   }
   
   function vote(id) {
      var poststr = "sitaatti_id=" + id;
      var numvotes = "num_votes_" + id;
      var annapeukku = "anna_peukku_" + id;
      var new_number = 0;
      var new_text = "";
      makePOSTRequest('/vote_citate.php', poststr);

      old_number = parseInt (document.getElementById(numvotes).innerHTML);
      if (old_number == 0) {
    	  document.getElementById(numvotes).style.display = "block";
      }
      new_number = old_number + 1;
      if (new_number == 1) {
    	  new_text = new_number + " lukija tykkää tästä<br/>";
      } else {
    	  new_text = new_number + " lukijaa tykkää tästä<br/>";
      }
      document.getElementById(numvotes).innerHTML = new_text;
      document.getElementById(annapeukku).innerHTML = "";
   }