function setShow() {
    var contentID = document.getElementById('content');
    var spanIDs = contentID.getElementsByTagName('span');
//  alert('found '+spanIDs.length+' paragraphs');

    for ( var i=0, spanTabLen=spanIDs.length; i < spanTabLen; i++ ) {
      var thisSpan = spanIDs[i];
//    alert(thisSpan.id + ' '+thisSpan.className);
      if (thisSpan.className.indexOf('showIt') != -1 ) {
        thisSpan.className = 'hideIt';
      } else {
        if (thisSpan.className.indexOf('hideIt') != -1 ) {
          thisSpan.className = 'showIt';
        } else {
          if (thisSpan.className.indexOf('noneIt') != -1 ) {
            thisSpan.className = 'hiliteIt';
          } else {
            if (thisSpan.className.indexOf('hiliteIt') != -1 ) {
              thisSpan.className = 'noneIt';
            }
          }
        }
      }
    }
  }