Theme development

I'm currently developing a theme, and I'm new to the coding/programming side of web development (I'm a graphic designer, and want to learn to be a programmer!), and want to have the feature of a randomly rotating image as part of my theme's header. Currently I have 6 different images from which to choose, but would like to know how to actually get them to change on their own (either upon login or upon refresh).

I'm currently developing a theme, and I'm new to the coding/programming side of web development (I'm a graphic designer, and want to learn to be a programmer!), and want to have the feature of a randomly rotating image as part of my theme's header. Currently I have 6 different images from which to choose, but would like to know how to actually get them to change on their own (either upon login or upon refresh).

I would like the admin section of a site to display using the Garland theme instead of the sites default. I've set the administration theme to Garland in admin >> settings >> admin ... Garland has been saved as the selection but the admin section is displaying the sites default theme. Any ideas on how I can correct this?

Thanks

With Image Cache, if I change the sizes for my product catalogue defaults, do I have to re-upload all the images?

excuse my language, i'm french.
I put buddylist pictures in my membres 's profils.
To display inline these pictures, i made a css.
But it's not very good..

Do you have another solution ???

CSS of the table :
.buddy img{
float:left;
display:inline;

Php code to show pictures :

Hello everyone!

I'm having difficulties creating this structure for my navigation:

Item
• Subitem
• Subitem

How do I accomplish this?

This is the website: http://www.guerillainc.com/?q=node/10

I can either make ALL the bullets disappear or make ALL the bullets stay. How do I apply a custom class to the subitems? I can do this with HTML but I can't find the solution in Drupal.

Sincerely,