function treeToggle(i) 
{
	var div = document.getElementById('treeCont_' + i);
	var img = document.getElementById('treeImg_' + i);
	
	if (window.getComputedStyle) { //moz
		var s = window.getComputedStyle(div, null);
	} else if (div.currentStyle) { //ie
		var s = div.currentStyle;
	} else {
		return;
	}

	if (s.display == 'none') {
		div.style.display = 'block';
		img.src = '/fileadmin/img/icon/tree_close.gif';
	} else {
		div.style.display = 'none';
		img.src = '/fileadmin/img/icon/tree_open.gif';
	}
}