function wopen(url, w_name, w_width, w_height, topWin, leftWin) {
	if (!w_width || !w_height) return false;
	w_width+=20;
	w_height+=20;
	gWindow = window.open(url, null,"menubar=no,toolbar=no,scrollbars=no,status=no,width="+w_width+",height="+w_height+",top="+topWin+",left="+leftWin);
	if (gWindow) gWindow.focus();
	return false;
}