function createExpandyLink(showLinkId, hideLinkId, textId)
{
  var placeholder = $(showLinkId);
  $('div' + textId + ' div').each(function(i) {
    $(this).show();
  }
  );

    if (placeholder != null) {
        placeholder.html('<a href="" title="Reveal further information">More info</a>');
        placeholder.click(function() {
            $(showLinkId).hide();
            $(textId).show();
            return false;
        });
    }
}

function createCollapsyLink(showLinkId, hideLinkId, textId)
{
  var placeholder = $(hideLinkId);
  if (placeholder != null) {
      placeholder.html('<a href="" title="Hide further information">Hide info</a>');
      placeholder.click(function() {
          $(showLinkId).show();
          $(textId).hide();
          return false;
      });
  }
}

function setupCollapsyText(evt)
{
    var elem = $('#expandyIntroText');
    if (elem != null) {
        elem.hide();
    }  
  // create expander link
    createExpandyLink('#showIntroText', '#hideIntroText', '#expandyIntroText');
  // create collapser link
    createCollapsyLink('#showIntroText', '#hideIntroText', '#expandyIntroText');
}

// execute on dom ready
$(document).ready(function() {
    setupCollapsyText();
});