function openNewWindow(URLtoOpen, windowName) {
	var w = 800;
	var h = 700;
	var left = (screen.width/2)-(w/2);
	var top = (screen.height/2)-(h/2);
	newWindow=window.open(URLtoOpen, windowName, 'toolbar=0,location=0,directories=0,status=no,menubar=0,scrollbars=yes,resizable=yes,width='+w+',height='+h+',titlebar=no,top='+top+', left='+left); 
	newWindow.focus();
}