function show_hide(id_arrow_div, id_a, id_table)
	{
		var elem = document.getElementById(id_arrow_div);
		var	txt = document.getElementById(id_a);
		var	tbl = document.getElementById(id_table);
		
		if (elem.className=="doublelink_wrap arrowup")
				{
					elem.className="doublelink_wrap arrowdown";
					txt.innerHTML=txt.innerHTML.replace('Показать', 'Скрыть');
					tbl.style.display = 'block';
				}
			else
				{
					elem.className="doublelink_wrap arrowup";
					txt.innerHTML=txt.innerHTML.replace('Скрыть', 'Показать');
					tbl.style.display = 'none';
				}
	}