// to cater for customised submenu items to show onmouseover 
//function calls are from navigation.xsl
//originally display is hidden by css although the siteconf.xml sets the subitems to be shown.
//IMPORTANT: only works for menu with the folder as parent (see navigation document)
//IMPORTANT: in siteconf.xml, contextualised menu MUST BE FALSE 

function displaySubItems(item) {
	var navtree = document.getElementById(item);
	var subitems = navtree.getElementsByTagName('ul');
	subitems[0].style.display = 'block';
	
}

function hideSubItems(item) {
	var navtree = document.getElementById(item);
	var subitems = navtree.getElementsByTagName('ul');
	subitems[0].style.display = 'none';	
}

/*
//for FAQ section
function toggleShowHide(element) {
	element = document.getElementById(element);

	if (element.style.display != 'none') {
		element.style.display = 'none';
	}
	else {
		element.style.display = 'block';
	}
}


function getElementsByClass(searchClass,node,tag) {
	var classElements = new Array();
	if ( node == null )
		node = document;
	if ( tag == null )
		tag = '*';
	var els = node.getElementsByTagName(tag);
	var elsLen = els.length;
	var pattern = new RegExp('(^|\\s)'+searchClass+'(\\s|$)');
	for (i = 0, j = 0; i < elsLen; i++) {
		if ( pattern.test(els[i].className) ) {
			classElements[j] = els[i];
			j++;
		}
	}
	return classElements;
}
*/