function open_window (url, name, features, width, height, center) {

	if (name == '') {

		name	=	'Detailansicht';

	}

	if ( (height == '') || (height == 0) ) 	height	=	500;

	if ( (width == '') || (width == 0) ) 	width	=	500;

	if ( (features == "none") || (features == '') ) {

		features = "toolbar=no,location=no,directories=no,status=yes,menubar=no,scrollbars=yes,resizable=yes";

	} else {	

		if (features == "all") {

			features = "toolbar=yes,location=yes,directories=yes,status=yes,menubar=yes,scrollbars=yes,resizable=yes";

		}

	}

	

	if (window.screen) {

		if ((center != '') && (center != 'false')) {

			var	offset			=	30;

			var	bottom_offset	=	70;

		

			switch (center) {

				case 'top-left':

					var myLeft	=	offset;

					var myTop	=	offset;

				break;

				case 'top-right':

					var myLeft	=	screen.availWidth - width - offset;

					var myTop	=	offset;

				break;

				case 'top-middle':

					var myLeft	=	(screen.availWidth - width) / 2;

					var myTop	=	offset;

				break;

				case 'mid-left':

					var myLeft	=	offset;

					var myTop	=	( (screen.availHeight - height) / 2) - offset;

				break;

				case 'mid-right':

					var myLeft	=	(screen.availWidth - width) - offset;

					var myTop	=	( (screen.availHeight - height) / 2) - offset;

				break;

				case 'bottom-left':

					var myLeft	=	offset;

					var myTop	=	screen.availHeight - height - bottom_offset;

				break;					

				case 'bottom-middle':

					var myLeft	=	(screen.availWidth - width) / 2;

					var myTop	=	screen.availHeight - height - bottom_offset;

				break;

				case 'bottom-right':

					var myLeft	=	screen.availWidth - width - offset;

					var myTop	=	screen.availHeight - height - bottom_offset;

				break;

				default:

					var myLeft	=	(screen.availWidth - width) / 2;

					var myTop	=	( (screen.availHeight - height) / 2) - offset;						

				break;

			}

			features	+=	(features != '') ? ',' : '';

			features	+=	',left=' + myLeft + ',top=' + myTop;

		}

	}

	window.open (url, name, features + ((features != '') ? ',' : '') + 'width=' + width + ',height=' + height).focus();

}