background image change from admin panel

[arunondeck]

Simplest solution is to add this banner as a normal img inside page content, and position it respectively along with page content.
You can also make use of customfields plugin, add a special field for your image and add a call to this field inside your template file.
Last quite easy way of doing it, is a hardcoded path to image inside template file.
Just place an img tag inside template pointing to image located in for example data/uploads/banners, name the image the same as page slug, and call <?php get_page_slug(); ?>.jpg

Thank You for the suggestion. I went ahead with custom field.