function changeColor(id, color) {
        element = document.getElementById(id);
        element.style.background = color;
}

function showSubMenu(id)  {
	for (i = 1; i < 16; i++) {
	        var submenuid = 'submenu'+i+'container';
        	element = document.getElementById(submenuid);
		if(element) element.style.display = 'none';
	}

        var submenuid = 'sub'+id+'container';
        element = document.getElementById(submenuid);
        element.style.display = 'inline';
}