Update one list from another

Posted by lacqui on Stack Overflow See other posts from Stack Overflow or by lacqui
Published on 2010-05-20T22:44:25Z Indexed on 2010/05/20 22:50 UTC
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html

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JavaScript

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AJAX

I have two multi-select lists in HTML - one of categories, and another of items. What I want is that, when an item selected in the "category" list, everything in the "items" list from that category is also selected.

For example, if "Categories" contains "Animal", "Mineral", and "Vegetable", and "Items" contains "Dog", "Cat", "Monkey", "Diamond", "Granite", "Carrot", "Tomato":

If "Animal" is selected in one list, "Dog", "Cat", and "Monkey" should be selected; any other selections should remain as they are.

I'm using a Symfony PHP backend on the server, if that makes any difference

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