function show(current) {
	switch (current)
	{
		/* 1-й уровень подменю */
		case 'sluzba_zakaz':
			document.getElementById('sluzba_zakaz_level1').style.display = 'block';
			break;
		case 'proektirovanie':
			document.getElementById('proektirovanie_level1').style.display = 'block';
			break;
		case 'stroitelstvo':
			document.getElementById('stroitelstvo_level1').style.display = 'block';
			break;
		case 'otdelka':
			document.getElementById('otdelka_level1').style.display = 'block';
			break;

			/* 2-й уровень подменю */
			case 'fast':
				document.getElementById('fast_level2').style.display = 'block';
				break;
			case 'monolitte':
				document.getElementById('monolitte_level2').style.display = 'block';
				break;		
			case 'kottege':
				document.getElementById('kottege_level2').style.display = 'block';
				break;
			case 'shtukaturka':
				document.getElementById('shtukaturka_level2').style.display = 'block';
				break;
			case 'oblitsovka':
				document.getElementById('oblitsovka_level2').style.display = 'block';
				break;
			case 'malyar':
				document.getElementById('malyar_level2').style.display = 'block';
				break;
			case 'pol':
				document.getElementById('pol_level2').style.display = 'block';
				break;
			case 'oboi':
				document.getElementById('oboi_level2').style.display = 'block';
				break;
	}
}


	




function hide(current) {
	switch (current)
	{
		/* 1-й уровень подменю */
		case 'sluzba_zakaz':
			document.getElementById('sluzba_zakaz_level1').style.display = 'none';
			break;
		case 'proektirovanie':
			document.getElementById('proektirovanie_level1').style.display = 'none';
			break;
		case 'stroitelstvo':
			document.getElementById('stroitelstvo_level1').style.display = 'none';
			break;
		case 'otdelka':
			document.getElementById('otdelka_level1').style.display = 'none';
			break;

			/* 2-й уровень подменю */
			case 'fast':
				document.getElementById('fast_level2').style.display = 'none';
				break;
			case 'monolitte':
				document.getElementById('monolitte_level2').style.display = 'none';
				break;		
			case 'kottege':
				document.getElementById('kottege_level2').style.display = 'none';
				break;
			case 'shtukaturka':
				document.getElementById('shtukaturka_level2').style.display = 'none';
				break;
			case 'oblitsovka':
				document.getElementById('oblitsovka_level2').style.display = 'none';
				break;
			case 'malyar':
				document.getElementById('malyar_level2').style.display = 'none';
				break;
			case 'pol':
				document.getElementById('pol_level2').style.display = 'none';
				break;
			case 'oboi':
				document.getElementById('oboi_level2').style.display = 'none';
				break;
	}
}