add multiple items to cart

I have an order form where customers select items then I want to add a submit button which will add all items to cart. how do I do that?

EW,

First, you will want to get familiar with the AddToCart function. With a little if/then logic that discerns the ones that are actually selected, you can get all the items added to the cart in a button click event.

can you please help me with it?