var menuBackColor = '#EEEEEE';
var menuSelectedColor = '#CCCCCC';

function showMenu(id) {
	document.getElementById(id).style.visibility = 'visible';
	//document.getElementById('menu').style.position = 'relative';
}
function hideMenu(id) {
	document.getElementById(id).style.visibility = 'hidden';
	document.getElementById(id).style.position = 'absolute';
}
function changeColor(id) {
	//document.getElementById(id).style.backgroundColor = '#FFF000';\
	document.getElementById(id).style.backgroundColor = menuSelectedColor;
}
function changeColorBack(id) {
	//document.getElementById(id).style.backgroundColor = '#00CCFF';
	document.getElementById(id).style.backgroundColor = menuBackColor;
}