function linkHover(linkID) {
	lnk = document.getElementById(linkID);
	lnk.className = "linkHover";
}

function linkUnHover(linkID) {
	lnk = document.getElementById(linkID);
	lnk.className = "bottomnav";
}

function swapClass(obj, c1, c2) {
	if (obj.className != c1) { 
		obj.className = c1;
	} else {
		obj.className = c2;
	}
}