var BG_COLOR_ON = '#1c70b1';
var BG_IMG_ON = 'img/li-btn-sel.png';
var BG_COLOR_OFF = '#ffffff';
var BG_IMG_OFF = 'img/li-btn.png';
function setMenuOn(el_id) {
	el = document.getElementById(el_id);
	if (el) {
		el.style.backgroundImage = 'url(' + BG_IMG_ON + ')';
		el.style.backgroundColor = BG_COLOR_ON;
	}
}

function setMenuOff(el_id) {
	el = document.getElementById(el_id);
	if (el) {
		el.style.backgroundImage = 'url(' + BG_IMG_OFF + ')';
		el.style.backgroundColor = BG_COLOR_OFF;
	}
}