js如何动态改变页面特定位置的内容啊？

<%@ Page language="c#" Codebehind="WebForm9.aspx.cs" AutoEventWireup="false" Inherits="test.WebForm9" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" >
<HTML>
<HEAD>
<title>WebForm9</title>
<meta name="GENERATOR" Content="Microsoft Visual Studio .NET 7.1">
<meta name="CODE_LANGUAGE" Content="C#">
<meta name="vs_defaultClientScript" content="JavaScript">
<meta name="vs_targetSchema" content="http://schemas.microsoft.com/intellisense/ie5">
<script language="javascript">
function InsertImg()
{
var oCell = document.getElementById("TableImg").rows[0].cells[0];
var ImgHtml = "<IMG alt='你的图片' src='"+document.getElementById("drpImgList").value+"'>";
oCell.innerHTML = "";
oCell.innerHTML = ImgHtml;
}
</script>
</HEAD>
<body MS_POSITIONING="GridLayout">
<form id="Form1" method="post" runat="server">
<asp:DropDownList id="drpImgList" onchange="InsertImg()" runat="server"></asp:DropDownList>
<TABLE id="TableImg" cellSpacing="1" cellPadding="1" width="300" border="1">
<TR>
<TD></TD>
</TR>
</TABLE>
</FONT>
</form>
</body>
</HTML>

解决方案 »

  1.   

    <%@ Page language="c#" Codebehind="WebForm9.aspx.cs" AutoEventWireup="false" Inherits="test.WebForm9" %>
    <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" >
    <HTML>
    <HEAD>
    <title>WebForm9</title>
    <meta name="GENERATOR" Content="Microsoft Visual Studio .NET 7.1">
    <meta name="CODE_LANGUAGE" Content="C#">
    <meta name="vs_defaultClientScript" content="JavaScript">
    <meta name="vs_targetSchema" content="http://schemas.microsoft.com/intellisense/ie5">
    <script language="javascript">
    function InsertImg()
    {
    var oCell = document.getElementById("TableImg").rows[0].cells[0];
    var ImgHtml = "<IMG alt='你的图片' src='"+document.getElementById("drpImgList").value+"'>";
    oCell.innerHTML = "";
    oCell.innerHTML = ImgHtml;
    }
    </script>
    </HEAD>
    <body MS_POSITIONING="GridLayout">
    <form id="Form1" method="post" runat="server">
    <asp:DropDownList id="drpImgList" onchange="InsertImg()" runat="server"></asp:DropDownList>
    <TABLE id="TableImg" cellSpacing="1" cellPadding="1" width="300" border="1">
    <TR>
    <TD></TD>
    </TR>
    </TABLE>
    </FONT>
    </form>
    </body>
    </HTML>