document.frmUpload.submit()提示 ‘’为空或不是对象

Question

document.frmUpload.submit()提示 ‘’为空或不是对象代码：
   <input id="idNormal" name="idNormal" type="button" value="一般上传" onclick=" upload()"/>
<form action="#" method="post" enctype="multipart/form-data" name="frmUpload"> <script type="text/javascript">
  function upload()
  {
     
      document.frmUpload.submit();
  }
  </script>
这个简单的问题如何解决？

Answer 1

你的form嵌套了？form是不能嵌套的

Answer 2

你什么时候执行的脚本，执行顺序可能导致某些元素不可访问
要么document为空，要么frmUpload为空

Answer 3

去了form，也是这个问题错误提示。  <div id="divList">
        <ul>
            <li class="title">
                <h3>
                    文件上传配置</h3>
            </li>
        </ul>
        <ul>
            <li class="field">栏目类型：</li>
            <li class="fvalue select">
                <asp:DropDownList ID="ddlColumnType" runat="server" Width="130px" OnSelectedIndexChanged="ddlColumnType_SelectedIndexChanged"
                    AutoPostBack="True">
                    <asp:ListItem>文件上传栏目</asp:ListItem>
                </asp:DropDownList>
            </li>
        </ul>
        <ul>
            <li>
                <table border="0" class="upload">
                    <thead>
                        <tr>
                            <th style="height: 25px">
                                选择文件</th>
                            <th width="25%" style="height: 25px">
                                重命名</th>
                            <th width="15%" style="height: 25px">
                                操作</th>
                            <th width="15%" style="height: 25px">
                                状态</th>
                        </tr>
                    </thead>
                    <tbody id="idTable">
                        <tr>
                            <td style="height: 30px">
                                <input name="file" type="file" />
                                <span></span>
                            </td>
                            <td style="height: 30px">
                                <input size="15" name="title" type="text" />
                                <span></span>
                            </td>
                            <td align="center" style="height: 30px">
                                <a href="?">重置</a></td>
                            <td align="center" style="height: 30px">
                                <span>选择文件</span></td>
                        </tr>
                    </tbody>
                    <tfoot>
                        <tr>
                            <td colspan="4" align="center" style="height: 36px">
                                <input id="idAdd" type="button" value="添加文件" />
                                <input id="idQuick" type="button" value="极速上传" />
                                <input id="idNormal" name="idNormal" type="button" value="一般上传" onclick="upload()" />
                            
                             
                            </td>
                        </tr>
                    </tfoot>
                </table>
            </li>
        </ul>
        <ul>
            <li class="field">栏目高：</li>
            <li class="fvalue">
                <asp:TextBox ID="tbxColumnHeight" runat="server" CssClass="colorblue"></asp:TextBox>
            </li>
        </ul>
        <ul>
            <li class="field">栏目宽：</li>
            <li class="fvalue">
                <asp:TextBox ID="tbxColumnWidth" runat="server" CssClass="colorblue"></asp:TextBox>
            </li>
        </ul>
        <ul>
            <li class="field">栏目样式：</li>
            <li class="fvalue select">
                <asp:DropDownList ID="ddlColumnStyle" runat="server" Width="150px">
                    <asp:ListItem Selected="True">==此栏目暂无样式==</asp:ListItem>
                </asp:DropDownList>
            </li>
        </ul>
        <ul>
            <li class="btnSubmit">
                <asp:Button ID="btnConfirm" Text="提交" runat="server" CssClass="sbutton" OnClick="btnConfirm_Click" />
            </li>
            <li class="btnSubmit">
                <input id="Cancel" type="button" class="sbutton" value="取消" onclick="return Cancel_onclick()" />
            </li>
        </ul>
    </div>

Answer 4

 function upload()
      {
         document.divList.submit();
      }

Answer 5

给form加个id 
document.getElementID("id").submit();，先这样解决

Answer 6

你的浏览器源代码中肯定没有
name="frmUpload"
这个的，因为服务器控件需要
<form id=frmUpload runat=server>
这样，asp，ent就把你加的name="frmUpload"给去掉了，

Answer 7

因为在ascx文件中有个form 在aspx中有的form，因此我就在ascx中去掉了form，<div id="divList">
        <ul><li>  <input id="idNormal" name="idNormal" type="button" value="一般上传" onclick="upload()" /></li></ul></div>js中的代码变成了 function upload()
      {
         document.table1.submit();
         alert("successful");
      }但是问题依然是document.table1.submit();
为空或者不是对象。 

Answer 8

很简单，没找到frmUpload对象呗！
document.getElementById().
<script type="text/javascript">
  function upload()
  { 
  document.getElementById（"上传控件的id"）.submit();
  }
  </script>楼主试试上述方法，希望对你有帮助！

Answer 9

<script type="text/javascript">
  function upload()
  {  
  document.getElementById（"上传控件的id"）.submit();
  }
  </script>

Answer 10

 document.getElementById（"上传控件的id"）.submit();这个办法试过，问题依然存在

Answer 11

<input id="idNormal" name="idNormal" type="button" value="一般上传" onclick="this.form.submit()" /></li></ul></div>

Answer 12

document.getElementById（"上传控件的id"）这个对象哪里有submit方法啊？

Answer 13

var idNormal = document.getElementById("idNormal");
        idNormal.form.submit();

Answer 14

document.getElementById("idNormal")与
document.getElementById("idNormal").form是2个不同的对象