/*
  JavaScript code kindly taken/donated from the following site:
  http://devedge.netscape.com/viewsource/2003/devedge-redesign-js/
  Excellent article too :-)

  Small edits/tweaks made.

  Claire Knight
 */

function javascriptmenu(menuid)
{
	var i;
	var j;
	var node;
	var child;
	var parent;

	// if the browser doesn't even support document.getElementById, give up now.
	if (!document.getElementById)
	{
		return true;
	}


	// check for downlevel browsers
	// Opera 6, IE 5/Mac are not supported

	var version;
	var offset;

	offset = navigator.userAgent.indexOf('Opera');
	if (offset != -1)
	{
		version = parseInt('0' + navigator.userAgent.substr(offset + 6), 10);
		if (version < 7)
		{
			return true;
		}
	}

	offset = navigator.userAgent.indexOf('MSIE');
	if (offset != -1)
	{
		if (navigator.userAgent.indexOf('Mac') != -1)
		{
			return true;
		}
	}

	var menudiv = document.getElementById(menuid);

	// ul
	var ul = new Array();

	for (i = 0; i < menudiv.childNodes.length; i++)
	{
		node = menudiv.childNodes[i];
		if (node.nodeName == 'UL')
		{
			ul[ul.length] = node;
		}
	}

	// ul > li
	var ul_gt_li = new Array();

	for (i = 0; i < ul.length; i++)
	{
		node = ul[i];
		for (j = 0; j < node.childNodes.length; j++)
		{
			child = node.childNodes[j];
			if (child.nodeName == 'LI')
			{
				ul_gt_li[ul_gt_li.length] = child;
				child.style.display = 'inline';
				child.style.listStyle = 'none';
				child.style.position = 'static';
			}
		}
	}

	// ul > li > ul
	var ul_gt_li_gt_ul = new Array();

	for (i = 0; i < ul_gt_li.length; i++)
	{
		node = ul_gt_li[i];
		for (j = 0; j < node.childNodes.length; j++)
		{
			child = node.childNodes[j];
			if (child.nodeName == 'UL')
			{
				ul_gt_li_gt_ul[ul_gt_li_gt_ul.length] = child;
				child.style.position = 'absolute';
				child.style.left = '-13em';
				child.style.visibility = 'hidden';

				// attach hover to parent li
				parent = child.parentNode;
				parent.onmouseover = function (e)
				{
					var i;
					var child;
					var point;

					// stop the pure css hover effect
					this.style.paddingBottom = '0';

					for (i = 0; i < this.childNodes.length; i++)
					{
						child = this.childNodes[i];
						if (child.nodeName == 'UL')
						{
							point = getPageXY(this);
							setPageXY(child, point.x, point.y + this.offsetHeight);
							child.style.visibility = 'visible';
						}
					}
					return false;
				};

				parent.onmouseout = function (e)
				{
					var relatedTarget = null;

					if (e)
					{
						relatedTarget = e.relatedTarget;
						// work around Gecko Linux only bug where related target is null
						// when clicking on menu links or when right clicking and moving
						// into a context menu.
						if (navigator.product == 'Gecko' && navigator.platform.indexOf('Linux') != -1 && !relatedTarget)
						{
							relatedTarget = e.originalTarget;
						}
					}
					else if (window.event)
					{
						relatedTarget = window.event.toElement;
					}

					if (elementContains(this, relatedTarget))
					{
						return false;
					}

					var i;
					var child;

					for (i = 0; i < this.childNodes.length; i++)
					{
						child = this.childNodes[i];
						if (child.nodeName == 'UL')
						{
							child.style.visibility = 'hidden';
						}
					}
					return false;
				};
			}
		}
	}
	return true;
}