function openImg (path, w, h) {
	if (path === '') return;
	var imgwin = window.open(path, '_3dakimg', 'width=' + parseInt(w + 20) + ', height=' + parseInt(h + 20) + ', resizable=yes, scrollbars=no, adressbar=no, status=no');
	imgwin.focus();
}

function toggleGbForm (on) {
	document.forms['gb_form'].style.display = (on)? 'block' : 'none';
}