Select.selectedIndex : Select « Form « JavaScript Tutorial






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The selectedIndex property returns the index number of the selected option in that instance of a select box.

If this property is used to access a multiple select box, it will return the index number of the first selected item.

<html>
    <form name="myForm">
      <select name="mySelect" onChange='alert(mySelect.selectedIndex)'>
        <option value=A>AA</option>
        <option value=B>BB</option>
        <option value=C>CC</option>
        <option value=D>DD</option>
      </select>
    </form>
</html>








10.12.Select
10.12.1.Select
10.12.2.Select.blur()
10.12.3.Select.focus()
10.12.4.Select.form
10.12.5.Select.handleEvent()
10.12.6.Select.length
10.12.7.Select.name
10.12.8.Select.onBlur
10.12.9.Select.onChange
10.12.10.Select.onFocus
10.12.11.Select.options
10.12.12.Select.options.length
10.12.13.Select.options.selectedIndex
10.12.14.Select.options.value
10.12.15.Select.selectedIndex
10.12.16.Select.type
10.12.17.Triggering a Value Change from a Pop-Up Menu
10.12.18.Grouped selection control on change event