window.onload = rollup;

function rollout(objMenuitem, objEvent)
{
    var iKeyCode;
// 	alert("jdsafjdlsa");
    // 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 ) {
		if (objMenuitem.nextSibling.style) {
		    if (objMenuitem.nextSibling.style.display == 'block')
   		 	    var strDisplay = 'none'
   			 else
   		    	 var strDisplay = 'block';
		}
	}

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

    for (var i=0; i<objNested.length; i++)
        if (objNested[i].style.display == 'block')
            objNested[i].style.display = 'none';
	if ( objMenuitem.nextSibling ) {
		if (objMenuitem.nextSibling.style) {
		    objMenuitem.nextSibling.style.display = strDisplay;
		}
	}
    
    // Keep any parent menus for this item open
    while (objMenuitem.parentNode.parentNode.id != 'navigation')
    {
        objMenuitem = objMenuitem.parentNode.parentNode;
        objMenuitem.style.display = 'block';
    }
    // Stop the browser requesting the link
    //return false;
}

function rollup()
{
    var bRollup, objLinks, objNode, objAnchor;

    // Check we're working with a DOM compliant browser
    if (document.getElementById && document.createElement)
    {		
       // var strLocation = window.location;
        var objMenu = document.getElementById('navigation');
		objLi = objMenu.childNodes;
		for ( var i=0; i<objLi.length; i++) {
// 			alert(objLi[i].nodeName+"-"+i);
			if ( objLi[i].nodeName == "LI" ) {
				tmp = objLi[i].getElementsByTagName('li');
				if ( tmp.length == 0 ) {
					if ( objLi[i].firstChild.href ) {
						objLi[i].firstChild.onclick = function(event){return rollout(this, event);}
					}				
				}
			}
		}
        var objNested = objMenu.getElementsByTagName('ul');
		
        // 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');
			

            if (bRollup == true)
				objNested[i].style.display = 'none';
				
            else
                objNested[i].style.display = 'block';
				
            // Place the top-level text in an anchor tag
            objNode = objNested[i].parentNode;

            strContent = objNode.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));

            objNode.replaceChild(objAnchor, objNode.firstChild);
        }

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