如何去掉IE的菜单栏、地址栏

<script language="javascript">
history.back();
chatroom=window.open("chat.asp","chatroom","toolbar=no,status=no,resizable=yes")
chatroom.moveTo(0,0);
chatroom.resizeTo(screen.availWidth,screen.availHeight);
chatroom.outerWidth=screen.availWidth;
chatroom.outerHeight=screen.availHeight;
</script>