Prova così:

<div style="width: 578; height: 341; overflow-y: auto; overflow-x: hidden; scrollbar-highlight-color : #9999FF; scrollbar-shadow-color :#9999FF;scrollbar-darkshadow-color : Black; scrollbar-face-color : #6666FF; scrollbar-track-color : #9999FF;" tabindex=0>


ciao