CSS Scrollbar-face-color is not a known CSS property

Scrollbar-face-color is not a known CSS property

Scrollbar-face-color: #fff; Scrollbar-shadow-color: #bababa; Scrollbar-highlight-color: #bababa; Scrollbar-3dlight-color: #fff; Scrollbar-darkshadow-color: #fff; Scrollbar-track-color: #fff; Scrollbar-arrow-color: #bababa;

There is always a hint on the ASPX interface that is not a known CSS property, but there are scroll bars when running.
I ask in IE and Firefox to want to scroll bar, how to set better ah?

No tube. Just not in line with the agreement. Still used. You can use yours.

This is Microsoft's own extended attribute, not the standard, so, according to the standard validation is a hint of error,
But does not affect the running

Don't worry about it, just do it