function newWin(winUri, winName, win_w, win_h, winOpt) {
	var winPos_l = (screen.width - win_w) / 2;
	var winPos_t = (screen.height - win_h) / 8;
	if ( !winOpt ) winOpt = "status=yes,scrollbars=yes,directories=no,menubar=no,resizable=yes,toolbar=yes";
	
	var winFtr = 'left=' + winPos_l + ',top=' + winPos_t + ',width=' + win_w + ',height=' + win_h + ',' + winOpt;
	var newWin = window.open(winUri, winName, winFtr);
	newWin.focus();
	return;
}