function openWin(theURL) {
	var w = 410;
	var h = 380;
	var r = "no";
	vgwin =  window.open(theURL,'VGHTWin','resizable=' + r + ',width=' + w + ',height=' + h + ',left=10,top=10,screenX=10,screenY=10');
	vgwin.focus();
}

function toggleDisplay(whichLayer) {
  var elem, vis;
  if( document.getElementById )
    elem = document.getElementById(whichLayer);
  else if( document.all ) // old msie
    elem = document.all[whichLayer];
  else if( document.layers ) // nn4
    elem = document.layers[whichLayer];
  vis = elem.style;
  if(vis.display==''&&elem.offsetWidth!=undefined&&elem.offsetHeight!=undefined)
    vis.display = (elem.offsetWidth!=0&&elem.offsetHeight!=0)?'block':'none';
  vis.display = (vis.display==''||vis.display=='block')?'none':'block';
}