form表单不允许嵌套,如果嵌套,第一个form表单将无法正常提交,

可以使用js控制,将一个form表单分别做提交:

<form action="" method="post" name="myform">
      <input type="submit" class="button" name="Submit1" value="   确   定   "   onclick="SelSubmit1()"   />
      <input type="submit" class="button" name="Submit2" value="   确   定   "   onclick="SelSubmit2()"/>
    </form>

  <script   language="javascript"   type="text/javascript">
      function SelSubmit1()
      {
        document.myform.action='a.asp';
        document.myform.submit();
      }
      function   SelSubmit2()
      {
        document.myform.action='b.asp';
        document.myform.submit();
      }   
  </script>

也可以这样:

<script   language=javascript>   
  function   process(v){   
  if(v=="in"){   
  document.theForm.action="in.jsp";   
  }else{   
  document.theForm.action="out.jsp";   
  }   
  document.theForm.submit();   
  }   
  </script>   
    
  <form   name=theForm   method=post>   
  <input   type=text   name=username>   
  <input   type=text   name=password>   
  <input   type=button   name=login   value=LOGIN   onclick="process('in')">   
  <input   type=button   name=logout   value=LOGOUT   onclick="process('out')">   
  <form>