function wopen(url) {
	// Fudge factors for window decoration space.
	// In my tests these work well on all platforms & browsers.
	name = 'dw help';
	w = 750;
	h = 480; 
	var win = window.open(url, name, 'width=750,height=480,scrollbars=1,resizable=1');
	win.resizeTo(w, h);
	win.focus();
}