<%@ Page Language="C#" AutoEventWireup="true" CodeFile="loader.aspx.cs" Inherits="loader" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>Untitled Page</title>
<script type="text/javascript">
var x=document.getElementById('<%=TextBox1.ClientID%>').value;
if (x==null || x=="")
{
alert("First name must be filled out");
}
var validFilesTypes=["bmp","gif","png","jpg","jpeg"];
function Val ...
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