var insideLayer = false;

function navOver(id, isSub, fc) {

	var pf = (isSub ? '' : '_root');

	document.getElementById('nav_item_'+id).className = 'navigation_item'+pf+'_over';
	document.getElementById('nav_label_'+id).className = 'navigation_label'+pf+'_over';

	if (fc) {
		var arrow = document.getElementById('nav_arrow_'+id);
		if (arrow) arrow.src = "/mod_bin/general/arrow.php?fc="+fc;
	}

}

function navOut(id, isSub, fc) {

	var pf = (isSub ? '' : '_root');

	document.getElementById('nav_item_'+id).className = 'navigation_item'+pf;
	document.getElementById('nav_label_'+id).className = 'navigation_label'+pf;

	if (fc) {
		var arrow = document.getElementById('nav_arrow_'+id);
		if (arrow) arrow.src = "/mod_bin/general/arrow.php?fc="+fc;
	}
	
}

var active_layer;
function toggleLayer(id) {

	var el = document.getElementById(id);
	if (el) {
		current_state = !el.style.display; /* false=onzichtbaar / true=zichtbaar */
		
		if (!current_state && active_layer) {
			active_layer.style.display = 'none';
		}
		
		el.style.display = (current_state ? 'none' : '');
		active_layer = current_state ? null : el;
	}
	//

}