From Xojo Documentation

Read-Only Property (As Boolean )
BooleanValue = aWebAnimator.Hardware3DSupported

New in 2010r4

Supported for all project types and targets.

Returns True if the web browser supports native 3D transformations. If False, RotateX and RotateY have no effect.

Sample Code

Only call the RotateY method if the browser supports it:

If Animator1.Hardware3DSupported Then
Animator1.RotateY(ImageView1, 180, 0.5)
End If