function showMenu(id) {
		var el = $("#" + id);
		var pos = $(el).offset();
		var h = $(el).height();
		var div_id = "";
		switch(id) {
			case 'mm3': div_id = "dd3"; break;
			case 'mm4': div_id = "dd4"; break;
			case 'mm5': div_id = "dd5"; break;
			case 'mm6': div_id = "dd6"; break;
			default: ; break;
		}
		$("#" + div_id).css({
			'left': parseInt(pos.left) + 'px',
			'top': parseInt(pos.top) + parseInt(h) - 1 + 'px',
			'visibility': 'visible',
			'display': 'block'
		});	
	}

	function hideMenu(id) {
		var el = $("#" + id);
		var pos = $(el).offset();
		var h = $(el).height();
		var div_id = "";
		switch(id) {
			case 'mm3': div_id = "dd3"; break;
			case 'mm4': div_id = "dd4"; break;
			case 'mm5': div_id = "dd5"; break;
			case 'mm6': div_id = "dd6"; break;
			default: ; break;
		}
		$("#" + div_id).css({
			'visibility': 'hidden',
			'display': 'none'
		});	
	}

	function showBMenu(id) {
		var el = $("#" + id);
		var pos = $(el).offset();
		var h = $(el).height();
		var div_id = "";
		switch(id) {
			case 'mm3b': div_id = "dd3b"; break;
			case 'mm4b': div_id = "dd4b"; break;
			case 'mm5b': div_id = "dd5b"; break;
			default: ; break;
		}
		var ww = Math.ceil(($('body').innerHeight - 1002) / 2);
		var hh = $("#" + div_id).height();
		$("#" + div_id).css({
			'left': parseInt(pos.left) + 'px',
			'top': parseInt(pos.top) - parseInt(h) - hh + 18 + 'px',
			'visibility': 'visible',
			'display': 'block'
		});
	}

	function hideBMenu(id) {
		var el = $("#" + id);
		var pos = $(el).offset();
		var h = $(el).height();
		var div_id = "";
		switch(id) {
			case 'mm3b': div_id = "dd3b"; break;
			case 'mm4b': div_id = "dd4b"; break;
			case 'mm5b': div_id = "dd5b"; break;
			default: ; break;
		}
		$("#" + div_id).css({
			'visibility': 'hidden',
			'display': 'none'
		});	
	}