window.onload = function() {
	registerEvents();
}

function registerEvents() {
	var elem = document.getElementById("navMedizin");
	if (elem) {
		elem.onmouseover = function() { updateText("navbarcontent", "Medizinmanagement"); }
		elem.onmouseout = function() { updateText("navbarcontent", ""); }
	}
	elem = document.getElementById("navBeruf");
	if (elem) {
		elem.onmouseover = function() { updateText("navbarcontent", "Berufliches Rehamanagement"); }
		elem.onmouseout = function() { updateText("navbarcontent", ""); }
	}
	elem = document.getElementById("navPflege");
	if (elem) {
		elem.onmouseover = function() { updateText("navbarcontent", "Pflegemanagement"); }
		elem.onmouseout = function() { updateText("navbarcontent", ""); }
	}
	elem = document.getElementById("navTechnik");
	if (elem) {
		elem.onmouseover = function() { updateText("navbarcontent", "Technikmanagement"); }
		elem.onmouseout = function() { updateText("navbarcontent", ""); }
	}
	
}

function updateText(id, text) {
	var elem = document.getElementById(id);
	if (elem) {
		if (elem.hasChildNodes()) {
			elem.replaceChild(document.createTextNode(text), elem.firstChild);
		} else {
			elem.appendChild(document.createTextNode(text));
		}
	}
}