function idFromName(image) {
	var linkId = image.id.substr(2);
	return linkId;
}

function bottomNaviIn(name) {
	var id = idFromName(name);
	document.getElementById(id).style.background = "#8396DD";
	document.getElementById(id).style.border = "1px dotted #222222";
}

function bottomNaviOut(name) {
	var id = idFromName(name);
	document.getElementById(id).style.background = "";
	document.getElementById(id).style.border = "1px solid #CFD8F9";
}