getElementById with combobox

What do you mean ? Where do you want to 'remember the choice' ? You put an attribute in each item which is called id and stores an id.  Of course, you'd need to remember the id, so why not just remember the selection ? What exactly are you trying to do ?

I have a list of products, beside each product i have a select option to choose how many of a product we want to buy, then i need an invoice with the total amoney i have to pay. so i don't know how to save the choice that the user choose from this select

"I have a list of products, beside each product i have a select option to choose how many of a product we want to buy, then i need an invoice with the total amoney i have to pay. so i don't know how to save the choice that the user choose from this select "

Well, if you do a postback, then that selection is visible.  Or if you're making many selections before you postback, you can store them in a hidden field, for example, and read that on postback.  Is this for homework ?

yes I don't know how to give them an ID

can u plz give me an example

I have a loop from <select> that i bring them from a database, i want to remeber the choice and they told me by getElementById

:)))

Yes it is a homework, and it is not working with me, we can use PHP and javascript