function expandContent(blockId, imageId, imagePath)
  {
    if(document.getElementById(blockId).style.display == 'none')
    {
      document.getElementById(imageId).src=imagePath + '/objects/minus.gif';
      document.getElementById(blockId).style.display='block';
    }
    else
    {
      document.getElementById(imageId).src=imagePath + '/objects/plus.gif';
      document.getElementById(blockId).style.display='none';
    }
  }