I would like to know if the global variable %%GLOBAL_UPC%% (UPC/EAN) can be changed dynamically as the SKU variable does too.
The UPC fields appears inside of Options &SKU tab from backend. But only display the first value when i display %%GLOBAL_UPC%% in product page.
Exist some javascript or method to show the others values when changing options??
Remember that im talking about UPC (Not SKU) using the blueprint theme.