帮忙看下这段代码为何在运行时提示对象不支持此属性或方法
[code=C#][/code]<%@ Page Title="" Language="C#" MasterPageFile="~/userinfo/MasterPage.master" AutoEventWireup="true" CodeFile="ModInfo.aspx.cs" Inherits="userinfo_ModInfo" %>
<asp:Content ID="Content1" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server">
<link type="text/css" href="css/main.css" rel="stylesheet"/>
<script type="text/javascript">
function filepath() {
// document.getElementById("ContentPlaceHolder1_Uploader").select(); //选中FileUpload控件中的文本
// var path = document.selection.createRange().text; //获取当前文本选中的文本
// document.getElementById("filepath").value = path;
alert('abc');
}
</script>
<form id="form1" runat="server">
<div>
<div class="biao">　<asp:Label ID="topic" runat="server" Text="头像设置："></asp:Label>
</div></div>
<br />
<div class="conten">
<asp:Image ID="userface" runat="server" Height="128px" Width="128px"
ImageUrl="~/userinfo/face/celine.gif" />
<br />
<asp:Label ID="labelresult" runat="server" Text=""></asp:Label>

<br />
<br />

<asp:FileUpload ID="Uploader" runat="server"/>

 <br />
<br />
     

<asp:Button ID="Button1" runat="server" Text="上传" onclick="Button1_Click" OnClientClick="return filepath();" />
<input type="button" id="input" name="input" onclick="return filepath()" />
  （只支持JPG格式）<br />
<br />
<asp:HiddenField ID="imginfo" runat="server" />
<input type="hidden" id="filepath" name="filepath" />
<br />
</div>
</form>
</asp:Content>



[解决办法]
<asp:Button ID="Button1" runat="server" Text="上传" onclick="Button1_Click" OnClientClick="return filepath();" />

==>>>>>>

<asp:Button ID="Button1" runat="server" Text="上传" ></asp:Button>
在CS文件中的 page_onload 事件中 写
Button1.Attributes.Add("onclick","return filepath();");
[解决办法]
filepath()方法名改成aaa()看看再说