function changeman(sizing) {
	if (sizing >= 0.1 && sizing <= 1) {
		document.stereo_pictures.width  = wid * sizing;
		document.stereo_pictures.height = hid * sizing;
		
		var xDay = new Date;
		xDay.setDate(xDay.getDate() + 30);
		xDay = xDay.toGMTString();
		var wima = "sizing=" + sizing + ";";
		document.cookie = wima + "expires=" + xDay + ";";
	}
}