Body Background moves without the content

In Internet Explorer the background of the webpage moves without the rest of the p开发者_运维知识库age's content, I need the background to be fixed with the content, so when I resize it the background doesn't move, like the content inside it, here is the link to the website: Website Link

This error only appears in Internet Explorer. I have an internet explorer-only stylesheet you can view in the source of the website.

I believe instead of (or in addition to) position: fixed, you can use

background-attachment: fixed;

Hope that helps.