var prevItemId = -1;
var prevTitleDiv = null;

function toggleExpand(id, title, titleDiv) {
    var itemDiv = document.getElementById(id);
    if(itemDiv != null) {
       if(itemDiv.style.display == 'none') {

          // reset previous
          if(prevItemId != -1) {
             document.getElementById(prevItemId).style.display = 'none';
             var prevElem =  document.getElementById("titlespan"+prevItemId);
             prevElem.style.fontWeight = 'normal';
             prevElem.style.textDecoration = 'none';
          }
          prevItemId = id;
          prevTitleDiv = titleDiv;

          itemDiv.style.display = 'block';
          var elem = document.getElementById("titlespan"+id);
          elem.style.fontWeight = 'normal';
          elem.style.color = '#3b5d6a';
       } else {
          itemDiv.style.display = 'none';
          var elem = document.getElementById("titlespan"+id);
          elem.style.fontWeight = 'normal';
          elem.style.color = '#ffffff';
       }
    }
}