function d3popup(loc, width, height,scrolling)
{
	if(!width){width=400}
	if(!height){height=300}
	if(!scrolling){scrolling=0}

	var cTop = (screen.availHeight/2) - (height/2);
    var cLeft = (screen.availWidth/2) - (width/2);
    //var myBars = 'directories=no,location=no,menubar=no,status=no';
    var myBars = 'directories=no,location=no,menubar=no,status=yes';
	myBars += ',titlebar=no,toolbar=no';
	var myOptions = 'scrollbars='+scrolling+',width='+width+',height='+height+',top='+cTop+',left='+cLeft+',resizable=yes';
	var myFeatures = myBars + "," + myOptions;
	window.open(loc, '', myFeatures);
}