Jquery code is executing two times on ImageButton click.

Question

I have a grid view in which there are 7 columns, in which 2 are templet columns, in which I have Image button and hyper link.

on click image button and hyperlink i have called the javascript code. Hyperlink jquery code is working fine but on Image button click jquery code is executing two times.

On Hyperlink Click: It is deleting the file.

On ImaheButton Click: It is downloading the file and in crease the download counter by 1. Problem is here it is increasing the counter by 2 by executing two times.

Please help me ASAP.

ShowFiles_UC.ascx is code:

<script type="text/javascript" src="../Scripts/jquery-1.4.1.js"></script>

<script type="text/javascript">

    $(document).ready(function () {

        $("#<%=gvShowFiles.ClientID%>").tablesorter();

    }); 

</script>

<script type="text/javascript">

    function DeleteTheRow(fileid) 

    {

        var datastring = 'FileID=' + fileid;

        if (confirm("Do you want to delete this record?")) 

        {

            $.ajax({

                type: "POST",

                url: "WebService1.asmx/DeleteFile",

                data: datastring,

                success: function () {

                        $("a.delbutton" + fileid).parents(".record").css("background-color", "lightgreen");

                        $("a.delbutton" + fileid).parents(".record").fadeOut(500, function () {

                        $("a.delbutton" + fileid).parents(".record").remove();

                    });

                }

            });

        }

        return false;

    }

</script>

<script type="text/javascript">

    function DownloadFile() {

        $("#<%=gvShowFiles.ClientID %> tr").click(function () {

            if (!this.rowIndex) return;

            var download = $(this).children().eq(4).html(); ;

            alert("Ashutosh:"+download);

            $(this).children().eq(4).text(parseInt(download) + 1);

                });

    }

</script>

<table style="border: solid 1px ; background-color: #d5d5d5; width: 100%;">

    <tr>

        <td colspan="3">

            <strong>Your Files</strong></td>

    </tr>

    <tr>

        <td colspan="3">

            <asp:GridView ID="gvShowFiles" runat="server" CellPadding="4" GridLines="Horizontal"

            Font-Size="9pt" Font-Names="Arial" AutoGenerateColumns="False" RowStyle-CssClass="record"

              BorderColor="#DADADA" BorderStyle="Solid" BorderWidth="1px" 

                onrowdatabound="gvShowFiles_RowDataBound">

              <RowStyle CssClass="record"></RowStyle>

                <Columns>

                    <asp:BoundField HeaderText="File ID" DataField="FileID" HeaderStyle-Width="100">

<HeaderStyle Width="100px"></HeaderStyle>

                    </asp:BoundField>

                    <asp:BoundField HeaderText="File Name" DataField="FileName" 

                        HeaderStyle-Width="100">

<HeaderStyle Width="100px"></HeaderStyle>

                    </asp:BoundField>

                    <asp:BoundField HeaderText="Created On" DataField="CreatedOn" HeaderStyle-Width="100">

<HeaderStyle Width="100px"></HeaderStyle>

                    </asp:BoundField>

                    <asp:BoundField HeaderText="Modified On" DataField="ModifiedOn" HeaderStyle-Width="100">

<HeaderStyle Width="100px"></HeaderStyle>

                    </asp:BoundField>

                    <asp:BoundField HeaderText="Download" DataField="Downloads"

                        HeaderStyle-Width="100">

<HeaderStyle Width="100px"></HeaderStyle>

                    </asp:BoundField>

                    <asp:TemplateField>

                        <ItemTemplate>

                            <asp:ImageButton ImageUrl="~/Images/download.png" ClientIDMode="Static" 

                                runat="server" DescriptionUrl='<%# Eval("FileID") %>'  AlternateText='<%# Eval("FileName") %>' OnClientClick="DownloadFile();" onclick="btnDownload_Click" />

                        </ItemTemplate>

                    </asp:TemplateField>

                    <asp:TemplateField>

                      <ItemTemplate>

                       <%--<a href="#" id='<%# Eval("FileID") %>' class="delbutton"> <img  border="0" src="../Images/delete.jpg" alt="Delete" /></a>--%>

                       <a href="javascript:void(0);" id="delete<%# Eval("FileID") %>" class="delbutton<%# Eval("FileID") %>" onclick="DeleteTheRow(<%# Eval("FileID") %>);"> <img  border="0" src="../Images/delete.jpg" alt="Delete" /></a>

                       </ItemTemplate>

                    </asp:TemplateField>

                </Columns>

            </asp:GridView>

        </td>

    </tr>

</table>

ShowFiles_UC.ascx.cs is code:

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Data;

using FileSystem.BusinessLogic;

namespace FileSystem.UI.UserControls

{

    public partial class ShowFiles_UC : System.Web.UI.UserControl

    {

        protected void Page_Load(object sender, EventArgs e)

        {

            try

            {

                if (!Page.IsPostBack)

                {

                    if (Session["UserName"] != null)

                    {

                        gvShowFiles.DataSource = InputAndOutput_WS.ShowFiles(Convert.ToString(Session["UserName"]));

                        gvShowFiles.DataBind();

                        gvShowFiles.UseAccessibleHeader = true;

                        gvShowFiles.HeaderRow.TableSection = TableRowSection.TableHeader;

                        UserDetails.httpResponse = Response;

                    }

                }

            }

            catch (Exception ex)

            {

                Response.Write("Error: " + ex.Message);

                //Note: Exception.Message returns a detailed message that describes the current exception. 

                //For security reasons, we do not recommend that you return Exception.Message to end users in 

                //production environments. It would be better to put a generic error message. 

            }

        }

        protected void btnDownload_Click(object sender, ImageClickEventArgs e)

        {

            int iResult = 0;

            try 

            {

                ImageButton imgDownload = (ImageButton)sender;

                //imgDownload.Attributes.Add("onclick", "alert('Ashutosh');");

                iResult = InputAndOutput_WS.DownloadFile(Convert.ToInt32(imgDownload.DescriptionUrl), imgDownload.AlternateText);

                if (iResult == 1)

                {

                    Response.Write("File Downloaded Successfully.");

                }

                else

                {

                    Response.Write("Failed to Downloaded the file.");

                }

            }

            catch (Exception ex)

            {

                Response.Write("Error: " + ex.Message);

                //Note: Exception.Message returns a detailed message that describes the current exception. 

                //For security reasons, we do not recommend that you return Exception.Message to end users in 

                //production environments. It would be better to put a generic error message. 

            }

        }

        protected void gvShowFiles_RowDataBound(object sender, GridViewRowEventArgs e)

        {

            //ImageButton btnDownload = sender as ImageButton;

            //if (e.Row.Cells[4].Text == btnDownload.AlternateText)

            //{

            //    e.Row.Attributes.Add("onclick", "DownloadTheFile()");

            //}

        }

    }

}