function show(url, w, h){
	var leftPosition = (screen.width) ? (screen.width-w)/2 : 0;
	var topPosition = (screen.height) ? (screen.height-h)/2 : 0;
	window.open(url, 
	'Publications', 'toolbar=0,location=0,status=0,menubar=0,scrollbars=1,resizable=1,width='+w+',height='+h+',top='+topPosition+',left='+leftPosition);
}