[Stizerg]

Is there an easy way to get product's sequence number in current category?
For example if I open 5th product I need to get something like $current_product=4 (considering it starts with 0), so then I can pass it to javascript.
I know I can go through $products or $cat_products to get this number, I just was wondering if that number already exists somewhere.
It's for v.4.4.4