Hello phantomolve
if the images folder is the same location as the CSS. then all you need is:
background-image: url(images/bg.gif);
if not, then you need:
background-image: url(AppThemes/Blue/images/bg.gif);
this should work. the background-image property works for setting the background any html element supporting this feature, including a textbox.
Dinia Oussama
http://oudinia.blogspot.com