ie8 background-image : url("null")

Hi,
I just bought start up template a few days ago and I have a problem with ie8 compatibility.
Everething works fine on Firefox and ie9 but my footer background image isn't loaded on ie8.
When I'm looking at ie8 css style and I replace ("null") by the right adress, it works!
Also, if I check on "use prefixfree" in the template option, it works but, everything is not loaded on the website like Image show gk4.
I looked at some forum and somme people talk about "selectivizr". I did'nt fint anything else.
If a take look at the index code page, there something strange to me :

<!--[if (gte IE 6)&(lte IE 8)]>
<script type="text/javascript" src="http://comesud.com/templates/gk_startup/js/respond.js"></script>
<script type="text/javascript" src="http://comesud.com/templates/gk_startup/js/selectivizr.js"></script>
<script type="text/javascript" src="http://html5shim.googlecode.com/svn/trunk/html5.js"></script>
<![endif]-->

I DO NOT HAVE ANY RESPOND.JS OR SELECTIVIZR.JS FILE!!!

I think this could be the problem but I'm not thure about that.

So many thanks for your helps.

Regards

Hi,
please send me Private Message with access to your joomla backend and FTP details. Remember add link to this topic too.

Hi,
Thanks for your interest but I found the solution, I just deleted this line in my php file :
<script type="text/javascript" src="http://comesud.com/templates/gk_startup/js/selectivizr.js"></script>

Everything work fine now.

Regards