var http_request = false;
   function makeRequest(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('GET', url + parameters, true);
      //alert(url + parameters);
      http_request.send(null);
   }

   function alertContents() {
      if (http_request.readyState == 4) {
         if (http_request.status == 200) {
            var result = http_request.responseText;
	    var myresult = result.split("|");
//	      alert(myresult);
	    var elid = myresult[0];
            document.getElementById(elid).className = myresult[1];
            document.getElementById('SelectedBlocks').style.display = "block";
            document.getElementById('LockedBlocks').innerHTML += myresult[2];
            document.getElementById('ReserveButton').style.display = "block";
	    if(myresult[3] != undefined) {
	      alert(myresult[3]);
	    }
         } else {
            alert('There was a problem with the request.');
         }
      }
   }
   
   function getLink(querystring) {
      var getstr = "?";
      getstr += querystring
      makeRequest('js/ajax-babypool-process.php', getstr);
   }