VS 2003 不方便调前台代码 想实现这个判断，但是 又不会JS ，来个JS 的帮个忙
- HTML code
<TABLE border=0 cellSpacing=0 cellPadding=0 width=650> <TR border="1"> <TD style="FONT-SIZE: 16px">上传员工资料 </TD> <TD><A href="../archive_info/archive_add.aspx?type='append'">添加</A> </TD></TR> <TR> <TD colSpan=2> <TABLE id=tableNecessary border=0 width="99.5%"> <TR> <TD style="COLOR: #333333; FONT-SIZE: 14px" bgColor=#9db8e8 colSpan=3>员工资料上传--必要资料 </TD></TR> <TR> <TD width="99.5%"> <table cellspacing="0" rules="all" border="1" id="DataGridNecessary" width="100%"> <tr> <td>资料名称</td><td>文件名称</td><td>操作列</td> </tr><tr> <td>户口本复印件</td><td> <span id="DataGridNecessary__ctl2_Lbl_Nece">Blue hills.jpg</span> </td><td> <input type="submit" name="DataGridNecessary:_ctl2:linkUpNece" value="重新上传" id="DataGridNecessary__ctl2_linkUpNece" /> </td> </tr><tr> <td>毕业证书</td><td> <span id="DataGridNecessary__ctl3_Lbl_Nece">Blue hills.jpg</span> </td><td> <input type="submit" name="DataGridNecessary:_ctl3:linkUpNece" value="重新上传" id="DataGridNecessary__ctl3_linkUpNece" /> </td> </tr> </table></TD></TR></TABLE></TD></TR> <TR> <TD colSpan=2> <TABLE id=tableNon width="99.5%"> <TR> <TD style="COLOR: #333333; FONT-SIZE: 14px" bgColor=#9db8e8 colSpan=3>员工资料上传--非必要资料</TD></TR> <TR> <TD><table cellspacing="0" rules="all" border="1" id="DatagridNon" width="100%"> <tr> <td>资料名称</td><td>文件名称</td><td>操作列</td> </tr><tr> <td>身份证复印件</td><td> <span id="DatagridNon__ctl2_Lbl_Non">Winter.jpg</span> <asp:HyperLink ID="href1" NavigateUrl=""></asp:HyperLink> </td><td> <input type="submit" name="DatagridNon:_ctl2:LinkUpNon" value="重新上传" id="DatagridNon__ctl2_LinkUpNon" /> </td> </tr> </table></TD></TR></TABLE></TD></TR> <TR> <TD colSpan=2> <TABLE id=tablebtn width="99.5%"> <TR> <TD width="20%" align=center><input type="submit" name="btn_Confirm" value="提交资料" id="btn_Confirm" /></TD></TR></TABLE></TD></TR></TABLE> </td></tr></table>