Wordpress theme modification sticky/shrinking header & logo - repost

Avg Bid (USD)
Project Budget (USD)
$10 - $30

Project Description:
Hi there,
I need someone to to implement a shrinking sticky header & logo effect on my wordpress theme which is a theme based on wp theme 2013.
you can find an example of the desired effect here: http://theme-fusion.com/avada/
cross-browser compatibility should be as high as possible, all changes to the theme must be marked by you in order for us to recognize what has been edited. Please do not try to solve this by a plugin, but code it yourself. Be aware that the graphic itself should shrink and navi must still be accessible and have the same style.
Login to site or theme files will be provided after project is awarded.
Thank you.

Skills required:
CSS, HTML, jQuery / Prototype, PHP, Wordpress
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