Why is it possible, in a CSS, to alter the props of a scrollbar...but not a combobox!

[Wokawidget]

using:

BODY, SELECT
{
scrollbar-face-color:red;
scrollbar-shadow-color: Maroon;
scrollbar-highlight-color: #FF7F50;
scrollbar-3dlight-color:pink;
scrollbar-darkshadow-color:darkgreen;
scrollbar-track-color: green;
scrollbar-arrow-color: white;
}

so...why can't you do anything like this with a combo???

Woka