function show_nav()
{
	
	link_list = document.getElementById("in_this_section");

	for( var x = 0; x < link_list.childNodes.length; x++ ) 
	{
		link_list.childNodes[x].className = 'all';
	}
	
	document.getElementById("show_nav_ul").className = 'nav_li_hide';

	
}