// JavaScript Document

var hideMenu = {
  swapOut: function(placeholderId,dummyId) {
    var dummy = document.getElementById(dummyId);
    var placeholder = document.getElementById(placeholderId);
    if (!dummy) {
      alert("element with id " + dummyId + " does not exist");
    }
    if (!placeholder) {
      alert("element with id " + placeholderId + " does not exist");
    }

    /* loop through dummy nodes removing any JS nodes, preventing double execution */
    for (index = dummy.childNodes.length - 0; index >= 0; index--)
    {
      var element = dummy.childNodes[index];
      if ((element.nodeName == 'SCRIPT') || (element.nodeName == 'NOSCRIPT'))
              dummy.removeChild(element);
    }

    dummy.parentNode.removeChild(dummy);
    placeholder.parentNode.replaceChild(dummy, placeholder);
    dummy.style.display = 'block';
  }
};