Cant' get scrollbar to show up in pop up

[J. Muenchbourg]

I can't get my popup window to display a scroll bar with the following
function:

<script language="JavaScript">
<!------hide
function newwindow0()
{

window.open('0-aboutus.shtml','jav','width=517,height=673,resizable=yes,
scrollbars=yes');
}//------->

</script>

This is a popup where the user clicks on a link. The onClick works, as
it does show the popup, it just doesnt display it with a scrollbar

Thanks in advance
Muench