function nastaveni_lupy(source, source2) {
    // nastaveni lupy
	if ($(source2).length) {
		var sirkalupy = 300;
		var vyskalupy = 200;
		var position = $(source2).position();
		var toplupy = position.top;
		var leftlupy = $(source2).width() + 5;
		$(source).jqueryzoom({
			xzoom: sirkalupy,
			yzoom: vyskalupy,
			top: 0,
			left: leftlupy,
			position: "right",
			preload:1,
			lens:0
		});
	}
}