MouseEvent which Property
Which mouse button was pressed when the mouse event was triggered:
The which property is deprecated.
Use the button property instead.
|Return Value:||A Number.
Which mouse button that was pressed:
0 : Left button
1 : Wheel or middle button (if present)
2 : Right button
For a left-hand configured mouse, the values are reversed.
|DOM Version:||DOM Level 2 Events|