asp.net javascript message show get response and delete row

I have an asp.net web app.

in a gridview i list some records and there is a delete asp button in each row.

when i click delete button on the page.

i pop up javascript message in GridView1_RowDataBound

since this is a click event i catch it with below line.

Button x = e.Row.FindControl("DeleteButton") as Button;
            x.Attributes.Add("onclick", "javascript:return confirm('Are you sure you want to delete:-" + x.CommandArgument.ToString() + "');");


But after that in the Row_Command i make a check on the patient and if operations exist on him/her (if i==true)

i want to display another pop up saying that operations exist do you still want to delete everything related with this person and according to the response i will delete or not.

What i could not achieve is ;

Since the second popup is not coming from button click or smthg i could not show the pop up,and get the user response, if user said OK then i should delete in the code behind if Cancel then do nothing.

As you can see my codes below can you help a little with the code what i should put to this code to make this work.. by the way i use MasterPage so ContentPlaceholder exists.
********************************
DESIGN
   <asp:GridView ID="GridView1" runat="server" OnRowCommand="GridView1_RowCommand" OnRowDataBound="GridView1_RowDataBound" OnRowDeleting="GridView1_RowDeleting">
    <Columns>

        <asp:TemplateField HeaderText="Silinecek">
            <ItemTemplate>
                <asp:Button ID="DeleteButton" runat="server" CommandName="Delete"  CommandArgument=<%#Eval("AD")%> Text="Delete"  />
            </ItemTemplate> 
        </asp:TemplateField>

    </Columns>
    </asp:GridView>

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**************************************************
CODEBEHIND
  protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
    {
        if (e.Row.RowType == DataControlRowType.DataRow)
        {

           Button x = e.Row.FindControl("DeleteButton") as Button;
            x.Attributes.Add("onclick", "javascript:return confirm('Are you sure you want to delete:-" + x.CommandArgument.ToString() + "');");
                  }
    }


protected void GridView1_RowCommand(object sender, GridViewCommandEventArgs e)
    {
        if (e.CommandName == "Delete")
        {
           string patient= e.CommandArgument.ToString();
           bool i = checkpatientexists(patient);

            if (i == true)'operations exist
            {
                ContentPlaceHolder cph = (ContentPlaceHolder)this.Master.FindControl("ContentPlaceHolder1");
                Button y = (Button)cph.FindControl("y");

                y.Attributes.Add("onclick", "javascript:return confirm('Do you again delete?:-');");

System.Web.HttpContext.Current.Response.Write("<SCRIPT LANGUAGE=JavaScript> if(confirm(Patient has operations==>>" + e.CommandArgument.ToString() + "')==true){};</SCRIPT>");
               
            }
        }
    }

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nicedoneAsked:
Who is Participating?
 
Kumaraswamy RCommented:
Hi

change java scrpit reg

ClientScript.RegisterClientScriptBlock(this.GetType(), "alert", "<script type='text/javascript'>" + "alert('Record deleted successfully!!!');</" + "script>");

http://www.dotnetspider.com/forum/293684-Show-alert-or-confirm-message-from-serverside-asp.net.aspx
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