[Asp.Net]无刷新验证码

VerifyCode.aspx：

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Drawing;

namespace VerifyColorCode_51aspx
{
    public partial class VerifyCode : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {

                VerifyCode v = new VerifyCode();

                v.Length = this.length;
                v.FontSize = this.fontSize;
                v.Chaos = this.chaos;
                v.BackgroundColor = this.backgroundColor;
                v.ChaosColor = this.chaosColor;
                v.CodeSerial = this.codeSerial;
                v.Colors = this.colors;
                v.Fonts = this.fonts;
                v.Padding