How to add multiple products on clicking add power button
I want to know how to add multiple products as a popup on clicking addpower button.. The process we select a frame and then add a power to it . So, once we click on add to power a popup displays with different quality lens that will be added to the frame price and we will have 6 to 8 lenses we can only select one lense at a time which will be added to the frame price. Please help me.