function show(el, val) {
		var layer = document.getElementById('r' + val).style.display;
		
		if (layer == 'none') {
			document.getElementById('r' + val).style.display = 'block';
			el.style.background = "url('./images/arrow-up.png') no-repeat center right";
		} else {
			document.getElementById('r' + val).style.display = 'none';
			el.style.background = "url('./images/arrow-down.png') no-repeat center right";
		}
	}
	
	function showTable(el, mas) {
		var firstEl = document.getElementById('r' + mas[0]).style.display;
		if (firstEl == 'none') {
			for (var i = 0; i < mas.length; i++) {
				document.getElementById('r' + mas[i]).style.display = '';
				document.getElementById('r' + mas[i]).style.background = "";
			}
			el.style.background = "url('./images/arrow-up.png') no-repeat top right";
		} else {
			for (var i = 0; i < mas.length; i++) {
				document.getElementById('r' + mas[i]).style.display = 'none';
			}
			el.style.background = "url('./images/arrow-down.png') no-repeat bottom right";
		}
	}