boxes not displaying right

[wtrk]

hi all i need a little help. im working on a advertising script of my own creation and it uses javascript to serve the ads. when i place the ads inside the postbit template to put them under the first post, it doesnt display the boxes for the ads correctly. they are random sizes, not the equal static sizes they are set to in the script. however, when i display the ads on a regualr non-vbulletin html page, they display correctly. attached are 2 screen shots showing in vb and not in vb. any help is much appreciated.

thanks.

pics:

#1 -- regular html page
#2 -- inside vbulletin postbit template