change combobox after selecting from another

[lleemon]

Using javascript,
I have two combo boxes. The first one is populated dynamically with a number at the end that is 1 - 10.
My second combo has just 10 items, 1 - 10. Based on selecting an item from the first combo can I change second combo so a select item is selected?

Thanks.

Found a solution:
.options[0].selected = true;