function zoom(url,theWidth,theHeight)
{
  var theTop=0;
  var theLeft=(screen.width/2)-(theWidth/2);

  var features='height='+theHeight+',width='+theWidth+',top='+theTop+',left='+theLeft+",scrollbars=yes,resizable=yes";
  //alert('h='+theHeight+' w='+theWidth+' t='+theTop+' l='+theLeft);
  theWin=window.open(url,'',features);
}

var treeopened = null;

function opentree(tree,classe)
{
	var cls = '';
	if (document.getElementById) {
		var el = document.getElementById (tree);
		if (el && el.className) {
			el.className = classe;
		}
	}
}
function closetree(tree,classe)
{
	var cls = '';
	if (document.getElementById) {
		var el = document.getElementById (tree);
		if (el && el.className) {
			el.className = 'navClosed';
		}
	}
}