ASP逻辑型字段数据提交更新,checkbox提交更新

<input type="checkbox" name="Passed" value="<%=rs("Passed")%>" <%if rs("Passed")=true then%>  checked="checked" <% end if%>>

<%
......
Passed=request("Passed")
if Passed="" then
rs("Passed")=false
else
rs("Passed")=true
end if
......
%>