char *genlist(int which){
	static char buf[7];
	if(which<0 || 26<=which) return 0;
	sprint(buf, "item %c", which+'a');
	return buf;
}
void scroll(void){
	Panel *l, *s;
	root=plgroup(0, 0);
	l=pllist(root, PACKE, genlist, 8, 0);
	s=plscrollbar(root, PACKW|FILLY);
	plscroll(l, 0, s);
}