jquery.scrollDetection detects your scroll position /up or down/
<script src="jquery.min.js"></script>
<script src="../jquery.scrollDetection.min.js"></script>
or
bower install scrolldetection
$.scrollDetection();
will be executed when you scroll down
default: {}
options: function
will be executed when you scroll up
default: {}
options: function
@author Mario Vidov
@url www.vidov.it
@twitter MarioVidov
MIT license