CSS - Box around ADS

Can someone please help me create a box around my ads? I’ve done some Google searches and haven’t been able to come up with anything. What I was looking for was the code and an explanation on how to use it.

 

Put the ads inside a <div>, then simply use border: 1px solid red; or whatever on that div.

I can give you an example if you want more.

 

Thanks for your help but I've just finished figuring it out.

 

Another method you could use is to use the <fieldset> tag.

 

Which would be semantically and structurally untrue. The fieldset tag defines its content as being a related set of form controls.

A div tag would be an appropriate container for ads, or the p tag could hold a single ad.

cheers,

gary