<%@ Control Language="C#" AutoEventWireup="true" CodeFile="ShowImages.ascx.cs" Inherits="ShowImagesControl" %>
<table border="0">
    <tr>
        <td align="center">
            <a href="javascript:window.close()">
                <asp:Image ID="imgProductImage" runat="server" BorderWidth="0" Width="400px" Height="400px">
                </asp:Image></a>
        </td>
    </tr>
    <tr>
        <td align="center">
            <input type="button" value="닫기" onclick="window.close();" style="border: 1px solid silver">
        </td>
    </tr>
</table>

using System;

public partial class ShowImagesControl : System.Web.UI.UserControl
{
    #region Event Handlers
    protected void Page_Load(object sender, System.EventArgs e)
    {
        this.imgProductImage.ImageUrl = "~/ProductImages/bigs/" + Request["ProductImage"];
    }
    #endregion
}