'loop' 语句缺少 'do' ???????????

以下代码在编译时老是出现如题错误，可我明明有‘do’，这是怎么回事？？？
....
........
<%
do while not rs.eof
if cint(left(formatdatetime(rs("logtime"),4),2))>8 then
action= "迟到"
late=late+1
%>
<tr>
<td><%=FormatDateTime(rs("logtime"),1)%></td>
<td><%=FormatDateTime(rs("logtime"),3)%></td>
<td><%=action%></td>
</tr>
<%
else if cint(left(formatdatetime(rs("logtime"),4),2))<16 then
action= "早退"
early=early+1
%>
<tr>
<td><%=FormatDateTime(rs("logtime"),1)%></td>
<td><%=FormatDateTime(rs("logtime"),3)%></td>
<td><%=action%></td>
</tr>
<%
end if
rs.movenext()
loop
%>
.....
.........