function expand_nav(link)
		{
			var ul = find_enclosing_ul(link)
			if (ul.style.display == 'none')
			{
				ul.style.display = 'block'
			}
			else
			{
				ul.style.display = 'none'
			}
		}
		
		function find_enclosing_ul(link)
		{
			var search_node = link
			while (true)
			{
				var node = search_node.nextSibling
				if (node && node.nodeName == 'UL')
				{
					break
				}
				else
				{
					search_node = node
				}
			}
			return node	
		}

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}