function zit_win(url, name, width, height, features){
	var l = (window.screen.availWidth) ? (window.screen.availWidth - width)/2 : 0;
	var t = (window.screen.availHeight) ? (window.screen.availHeight - height)/2 : 0;
	if (typeof(features) == 'string')
		features = ',' + features;
	var w = window.open(url, name, 'top=' + t + ',left=' + l + ',height=' + height + ',width=' + width + features);
	w.resizeTo(width, height);
	return w;
}