Add a new element to the collection of OPTION elements for this SELECT .

  Add a new element to the collection of OPTION elements
for this SELECT . This method is the equivalent of the
appendChild method of the Node interface if
the before parameter is null . It is
equivalent to the insertBefore method on the parent of
before in all other cases.
Parameters:
- element - The element to add.
- before - The element to insert before, or null for the tail of the list.
Throws:
- DOMException - NOT_FOUND_ERR: Raised if before is not a descendant of the SELECT element.

Removes keyboard focus from this element.

Gives keyboard focus to this element.

  The control is unavailable in this context.

  The control is unavailable in this context. See the disabled
attribute definition in HTML 4.0.

  Returns the FORM element containing this control.

  Returns the FORM element containing this control. Returns
null if this control is not within the context of a form.

The number of options in this SELECT .

  If true, multiple OPTION elements may be selected in this SELECT .

  If true, multiple OPTION elements may be selected in
this SELECT . See the multiple attribute definition in
HTML 4.0.

  Form control or object name when submitted with a form.

  Form control or object name when submitted with a form. See the name
attribute definition in HTML 4.0.

The collection of OPTION elements contained by this element.

  The ordinal index of the selected option, starting from 0.

  The ordinal index of the selected option, starting from 0. The value
-1 is returned if no element is selected. If multiple options are
selected, the index of the first selected option is returned.

  Number of visible rows.

  Number of visible rows. See the size attribute definition in HTML 4.0.

  Index that represents the element's position in the tabbing order.

  Index that represents the element's position in the tabbing order. See
the tabindex attribute definition in HTML 4.0.

  The type of this form control.

  The type of this form control. This is the string "select-multiple"
when the multiple attribute is true and the string
"select-one" when false .

The current form control value.

  Remove an element from the collection of OPTION elements for this SELECT .

  Remove an element from the collection of OPTION elements
for this SELECT . Does nothing if no element has the given
index.
Parameters:
- index - The index of the item to remove, starting from 0.