function rollout(objMenuitem, objEvent)
{
    var iKeyCode;

    // Check if from a keyboard - non IE, but
    // irrelevant as tab doesn't trigger the 
    // keypress event in IE
    if (objEvent && objEvent.type == 'keypress')
    {
	if (objEvent.keyCode)
	    iKeyCode = objEvent.keyCode;
	else if (objEvent.which)
	    iKeyCode = objEvent.which;

	// If it's not the enter key or space key, 
	// pass control back to the browser
	if (iKeyCode != 13 && iKeyCode != 32)
	    return true;
    }

    // Work out what we need to do
    if (objMenuitem.nextSibling.style.display == 'block')
	var strDisplay = 'none'
    else
	var strDisplay = 'block';

    // Close any nested lists that are open
    var objMenu = document.getElementById('mainnav');
    var objNested = objMenu.getElementsByTagName('ul');

    for (var i=0; i<objNested.length; i++)
	if (objNested[i].style.display == 'block')
	    objNested[i].style.display = 'none';

    objMenuitem.nextSibling.style.display = strDisplay;

    // Keep any parent menus for this item open
    while (objMenuitem.parentNode.parentNode.id != 'mainnav')
    {
	objMenuitem = objMenuitem.parentNode.parentNode;
	objMenuitem.style.display = 'block';
    }

    // Stop the browser requesting the link
    return false;
}

function rollup()
{
    if( document.open_menu_url ){
    openIf =
    location.href.substring(0,location.href.lastIndexOf('/')+1)+document.open_menu_url;
    }else{
    openIf = '';
    }

    var bRollup, objLinks, objNode, objAnchor;

    // Check we are working with a DOM compliant browser
    if (document.getElementById && document.createElement)
    {
	var strLocation = window.location;

	var objMenu = document.getElementById('mainnav');

	var objNested = objMenu.getElementsByTagName('li');

	// Hide each of the nested unordered list
	for (var i=0; i<objNested.length; i++)
	{
	    // Only hide, if the current location is not found in the list
	    bRollup = true;
	    objLinks = objNested[i].getElementsByTagName('a');

	    for (var j=0; j<objLinks.length; j++)
	    {
		if (objLinks[j].href == strLocation || objLinks[j].href == openIf)
		{
		    bRollup = false;

		    // Added by John Hunter
		    // remove link for current page
		    objNode = objLinks[j];
		    strContent = objNode.firstChild.data;
		    var objCurrentPage = document.createElement('span');
		    objCurrentPage.appendChild(document.createTextNode(strContent));
		    objNode.parentNode.replaceChild(objCurrentPage,objNode);

		    // Add an id so we can keep the parents open
		    objCurrentPage.parentNode.id = 'selected';
		}

	    }

	    if (bRollup == true && objNested[i].parentNode.id != 'mainnav')
		objNested[i].parentNode.style.display = 'none';
	    else
		objNested[i].parentNode.style.display = 'block';

	    // Place the top-level text in an anchor tag
	    if(objNested[i].id != 'selected' && objNested[i].firstChild.tagName != 'A'){
		strContent = objNested[i].firstChild.data;

		objAnchor = document.createElement('a');
		objAnchor.href = '#';
		objAnchor.onclick = function(event){return rollout(this, event);}
		objAnchor.onkeypress = function(event){return rollout(this, event);}
		objAnchor.appendChild(document.createTextNode(strContent));

		objNested[i].replaceChild(objAnchor, objNested[i].firstChild);
	    }
	}

	// Keep any parent menus for the current item
	if (document.getElementById('selected'))
	{
	    var objKeepOpen = document.getElementById('selected');
	    while (objKeepOpen.parentNode.id != 'mainnav')
	    {
		objKeepOpen = objKeepOpen.parentNode;
		objKeepOpen.style.display = 'block';
		if(objKeepOpen.parentNode.id == 'mainnav')
		    objKeepOpen.id = 'selectedParent';
	    }
	}
    }
}

//addEvent(window, 'load', rollup);