My logo is on the left and I have removed the 'tag line' text from header php. Now i want to add some banner advertising script in place of tag line. I knew it would not so easy as adding the script in between

'tag line' and changing tag line to 'script went here' i tried that and it would not work.

I don't see an area in banner manager to add banner html there. It is not just an image it is actual script.

How can I make it appear there were the tag line used to be in the header?