Click drop down for info

Hello new here so bear with me... Ive been trying all day... So on a e-commerce site i want to click through to an item... then there is a little button that drops down some info ( when i hover over it is says javascript ) save that info

then move on to the next item... I have followed the video but no luck... well i can get it to go through the items... but seems to load some random items...

All the best

Hard to diagnose without a URL, sitemap or HTML code.