function show(s) {
	hide();
	var id = s.href.match(/#(\w.+)/)[1];
	document.getElementById(id).style.visibility = 'visible';
}

function hide() {
	var descr = document.getElementById('descr').getElementsByTagName('div');
	for (var i = 0; i < descr.length; i++) {
		descr[i].style.visibility = 'hidden';
	}
}

function init() {
	if (document.getElementById && document.getElementsByTagName && document.createTextNode) {
		hide();
		var icons = document.getElementById('nav_objekte');
		var as = icons.getElementsByTagName('a');
		for (var i = 0; i < as.length; i++) {
			as[i].onmouseover = function() {
				show(this);
				return false;
			}
			as[i].onmouseout = function() {
				hide();
				return false;
			}
		}			
	}
}

window.onload = init;