javascript实现简单的进度条

后台代码，Default.aspx.cs：

using System;
using System.Data;
using System.Configuration;
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.Threading;
using System.IO;
 
public partial class _Default : System.Web.UI.Page 
{
  private void beginProgress()
  {
    //根据ProgressBar.htm显示进度条界面
    string templateFileName = Path.Combine(Server.MapPath("."), "ProgressBar.htm");
    StreamReader reader = new StreamReader(@templateFileName,System.Text.Encoding.GetEncoding("GB2312"));
    string html = reader.ReadToEnd();
    reader.Close();
    Response.Write(html);
    Response.Flush();
  }
 
  private void setProgress(int percent)
  {
    string jsBlock = "