function expand_nav(link)
{
	var ul = find_enclosing_ul(link)
	if (ul.style.display == 'none')
	{
		ul.style.display = 'block'
	}
	else
	{
		ul.style.display = 'none'
	}
	if (link.className == 'down')
	{
		link.className='down_open'
	}
	else
	{
		link.className='down'
	}
}
		
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 Show_BlkBlackTab(BlkBlackTabid_num,BlkBlackTabnum){
	for(var i=0;i<2;i++){document.getElementById("BlkBlackTabcontent_"+BlkBlackTabid_num+i).style.display="none";}
	for(var i=0;i<2;i++){document.getElementById("BlkBlackTabmenu_"+BlkBlackTabid_num+i).className="tab_off";}
	document.getElementById("BlkBlackTabmenu_"+BlkBlackTabid_num+BlkBlackTabnum).className="tab_on";
	document.getElementById("BlkBlackTabcontent_"+BlkBlackTabid_num+BlkBlackTabnum).style.display="";
}	


	function Show_hxhrg(BlkBlackTabnum){
	for(var i=0;i<5;i++){document.getElementById("hxhrgdiv_"+i).style.display="none";}
	document.getElementById("hxhrgdiv_"+BlkBlackTabnum).style.display="";
}	

	function Show_BlkBlackTabA(BlkBlackTabid_num,BlkBlackTabnum){
	for(var i=0;i<3;i++){document.getElementById("BlkBlackTabcontent_"+BlkBlackTabid_num+i).style.display="none";}
	for(var i=0;i<3;i++){document.getElementById("BlkBlackTabmenu_"+BlkBlackTabid_num+i).className="tab2_off";}

	document.getElementById("BlkBlackTabmenu_"+BlkBlackTabid_num+BlkBlackTabnum).className="tab2_on";
	document.getElementById("BlkBlackTabcontent_"+BlkBlackTabid_num+BlkBlackTabnum).style.display="";
}