stick-em-up
another sticky header plugin
$('header').stickEmUp();
options / defaults
autoMove: true, offset: 0, fixedClass: 'stickEm-fixed', inClass: 'stickEm-in', outClass: 'stickEm-out', delay: '', duration: '.3s'
autoMove will automatically move the header in & out, make it fixed, and add a spacer