') .css({ position: 'absolute', top: $(document).scrollTop(), // Use document scrollTop so it's on-screen even if the window is scrolled left: 0, height: $(document).height(), // Span the full document height... width: '100%', // ...and full width opacity: 0.7, // Make it slightly transparent backgroundColor: 'black', zIndex: 5000 // Make sure the zIndex is below 6000 to keep it below tooltips! }) .appendTo(document.body) // Append to the document body .hide(); // Hide it initially });