Javascript: Open / Close window

Window Close.js

		function close_popupWindow() {
		    window.self.opener = window.self;
		    window.self.close();
		}

Window Open.js

        var wnd;
        function open_popupWindow() {
            var w = 700;
            var h = 400;
            var left = (screen.width / 2) - (w / 2);
            var top = (screen.height / 2) - (h / 2);
            wnd = window.open('../Pages/shareDialog.html', 'share', 'toolbar=no, location=no, directories=no, status=no, menubar=no, scrollbars=no, resizable=no, copyhistory=no, width=' + w + ', height=' + h + ', top=' + top + ', left=' + left);

            /*
             *  Set the text in the window
             */
            setWindowContent();

            return wnd;
        }