var treeopened = null;
function opentree(tree)
{
	if (document.getElementById) {
		var el = document.getElementById (tree);
		if (el && el.className) {
			el.className = (el.className == 'mod_open') ? 'mod_closed' : 'mod_open';
		}
	}
	return false;
}

function toggleLayers( id,whichLayer )
{
  var elem, vis;
  if( document.getElementById ){ // this is the way the standards work
    elem = document.getElementById( whichLayer );
    sh = document.getElementById( id );
	}else if( document.all ){ // this is the way old msie versions work
		elem = document.all[whichLayer];
		sh = document.all[id];
	}else if( document.layers ){ // this is the way nn4 works
    elem = document.layers[whichLayer];
    sh = document.layers[id];
	}
	vis = elem.style;
  // if the style.display value is blank we try to figure it out here
  if(vis.display==''&&elem.offsetWidth!=undefined&&elem.offsetHeight!=undefined)
    vis.display = (elem.offsetWidth!=0&&elem.offsetHeight!=0)?'block':'none';
	
	sh.innerHTML = (vis.display==''||vis.display=='block')?'[+] show':'[-] hide';
	vis.display = (vis.display==''||vis.display=='block')?'none':'block';

}

function mover (o)
{
	o.className = 'mod_TitleOver';
}

function mout (o)
{
	o.className = 'mod_Title';
}