function startVR(startPanorama)
    {
		var pfad = 'html/de/vierjahreszeiten_' + startPanorama + '.html';

		var vrHeight = '650';
		var vrWidth = '950';

		var vrLeft = ((screen.availWidth - vrWidth)/2);
		var vrTop = ((screen.availHeight - vrHeight)/2);

        window.open(pfad, '360_degree_vrtour', 'width=' + vrWidth + ',height=' + vrHeight + ',top=' + vrTop + ',left=' + vrLeft + ',menubar=no,resizable=no, scrollbars=no, toolbar=no');
    }