function openNewWindow(target, width, height) {

	var features, w = width, h = height; 
	var top = (screen.height - h)/2, left = (screen.width - w)/2; 
	if(top < 0) top = 0; 
	if(left < 0) left = 0; 
	features = 'top=' + top + ',left=' +left; 
	features += ',height=' + h + ',width=' + w + ',resizable=no'; 
	popupWin = window.open(target, 'target01_window', features)
}