This tests onSelect for textareas.
This also makes sure that the correct selection is restored when the element regains focus.

Calling focus on textarea
After focus: textarea selection start: 0 end: 0

Calling setSelectionRange on textarea
After setSelectionRange(5, 10): textarea selection start: 5 end: 10

Double clicking to make selection for textarea
onselect fired for textarea
After double clicking: textarea selection start: 9 end: 13

Calling blur on textarea
After blur: textarea selection start: 9 end: 13

Calling focus on textarea
After focus: textarea selection start: 9 end: 13