From Xojo Documentation

Read-Only Property (As Boolean )
BooleanValue = aWebAnimator.MoveSupported

New in 2010r4

Supported for all project types and targets.

Returns True if move animation is supported by the web browser. If False, the Move method does nothing.

Sample Code

Only call Move if the browser supports it:

If Animator1.MoveSupported Then
Animator1.Move(Button1, 500, 500, 0.5)
End If