Navigator 2.0, Internet Explorer 3.0
The selected property is a read/write Boolean value that specifies whether a Option object within a Select object is currently selected. You can use this property to test whether a given option is selected. You can also use it to select (by setting it to true) or deselect (by setting it to false) a given option. Note that when you select or deselect an option in this way the Select.onchange() event handler is not invoked.
To determine the selected options in a Select object, you can loop through the Select.options array testing the selected property of each item. When multiple selections are not allowed (i.e., when the MULTIPLE attribute does not appear in the <SELECT> tag), however, it is much easier to simply check use the selectedIndex property of the Select object.