The Book of JavaScript, 2nd Edition

Select

The select form element can either be a pull-down menu or a scrollable list. The items in it are called the options of the select and are stored in the select element's options[] array.

Properties

length	FF, IE 3	Number of options in the select
multiple	FF, IE 4	If true, accept multiple selections in select box
name	FF, IE 3	select object's name
options[]	FF, IE 3	Read-only: Array containing the select's options. See "Option" on page 435 for more information.
selectedIndex	FF, IE 3	Contains the selected option's array position in a select element. If no item has been selected, selectedIndex is −1. If more than one option has been selected, selectedIndex contains the position of the first option. To determine all the options selected, use a loop to look ...