Sorry, I forgot to mention the credits, here they are:

1) This Addon is based on a free XTC modul, which I only modified for OSC
2) The essentail hint to get the script working with OSC was given by SIR.K.O from german osc forum, thanks.

Things to be done:
1) design improvement
2) center the layer in browser window with Javascript
3) make it work in modified shops, where you could add products to the cart elsewhere, e.g. on products_new.php, specials.php etc. For this case I would place the code in the footer, this should work (and of course the CSS in stylesheet.css)

FULL PACKAGE



More...