Changes the background image of the page

I chose this from a website template http://www.freewebtemplates.com/premium-templates/blog/
http://www.4templates.com/website-templates/172554656-WT00870/demo/#green

css/custom.css

@@ -7,7 +7,7 @@ body {
 }
 
 .pageBackground {
-background-image:url(images/backgroundTexture.png);
+background-image:url(images/woodTexture.jpg);
 background-repeat:repeat;
 }