Every other page is fine but when you go to a post's page the background.
jholway.com is the site.
Here is a blog post (with no background)
I am using a bit of PHP that has the background images change when you refresh the page but I can't understand why it works everywhere but there.
Here's the php:
$bg = array('bg-01.jpg', 'bg-02.jpg', 'bg-03.jpg', 'bg-04.jpg', 'bg-05.jpg' ); // array of filenames
$i = rand(0, count($bg)-1); // generate random number size of the array
$selectedBg = "$bg[$i]"; // set variable equal to which random filename was chosen