asp.net后台如何输出js脚本，用page.ClientScript.RegisterStartupScript方式实现，实现示例如下，感兴趣的朋友不要错过

用page.ClientScript.RegisterStartupScript方式实现    代码为：  代码如下: /**//// <summary>  /// 弹出JavaScript小窗口  /// </summary>  /// <param name="js">窗口信息</param>  public static void Alert(string message, Page page)  {  #region  string js = @"<Script language='JavaScript'>  alert('" + message + "');</Script>";  //HttpContext.Current.Response.Write(js);  if (!page.ClientScript.IsStartupScriptRegistered(page.GetType(), "alert"))  {  page.ClientScript.RegisterStartupScript(page.GetType(), "alert", js);  }  #endregion  }    /**//// <summary>  /// 弹出消息框并且转向到新的URL  /// </summary>  /// <param name="message">消息内容</param>  /// <param name="toURL">连接地址</param>  public static void AlertAndRedirect(string message, string toURL, Page page)  {  #region  string js = "<script language=javascript>alert('{0}');window.location.replace('{1}')</script>";  //HttpContext.Current.Response.Write(string.Format(js, message, toURL));  if (!page.ClientScript.IsStartupScriptRegistered(page.GetType(), "AlertAndRedirect"))  {  page.ClientScript.RegisterStartupScript(page.GetType(), "AlertAndRedirect", string.Format(js, message, toURL));  }  #endregion  }    /**//// <summary>  /// 回到历史页面  /// </summary>  /// <param name="value">-1/1</param>  public static void GoHistory(int value, Page page)  {  #region  string js = @"<Script language='JavaScript'>  history.go({0});  </Script>";  //HttpContext.Current.Response.Write(string.Format(js, value));  if (!page.ClientScript.IsStartupScriptRegistered(page.GetType(), "GoHistory"))  {  page.ClientScript.RegisterStartupScript(page.GetType(), "GoHistory", string.Format(js, value));  }  #endregion  }    /**//// <summary>  /// 刷新父窗口  /// </summary>  public static void RefreshParent(string url, Page page)  {  #region  string js = @"<Script language='JavaScript'>  window.opener.location.href='" + url + "';window.close();</Script>";  //HttpContext.Current.Response.Write(js);  if (!page.ClientScript.IsStartupScriptRegistered(page.GetType(), "RefreshParent"))  {  page.ClientScript.RegisterStartupScript(page.GetType(), "RefreshParent", js);  }  #endregion  }      /**//// <summary>  /// 刷新打开窗口  /// </summary>  public static void RefreshOpener(Page page)  {  #region  string js = @"<Script language='JavaScript'>  opener.location.reload();  </Script>";  //HttpContext.Current.Response.Write(js);  if (!page.ClientScript.IsStartupScriptRegistered(page.GetType(), "RefreshOpener"))  {  page.ClientScript.RegisterStartupScript(page.GetType(), "RefreshOpener", js);  }  #endregion  }      /**//// <summary>  /// 打开指定大小的新窗体  /// </summary>  /// <param name="url">地址</param>  /// <param name="width">宽</param>  /// <param name="heigth">高</param>  /// <param name="top">头位置</param>  /// <param name="left">左位置</param>  public static void OpenWebFormSize(string url, int width, int heigth, int top, int left, Page page)  {  #region  string js = @"<Script language='JavaScript'>window.open('" + url + @"','','height=" + heigth + ",width=" + width + ",top=" + top + ",left=" + left + ",location=no,menubar=no,resizable=yes,scrollbars=yes,status=yes,titlebar=no,toolbar=no,directories=no');</Script>";  //HttpContext.Current.Response.Write(js);  if (!page.ClientScript.IsStartupScriptRegistered(page.GetType(), "OpenWebFormSize"))  {  page.ClientScript.RegisterStartupScript(page.GetType(), "OpenWebFormSize", js);  }  #endregion  }      /**//// <summary>  /// 转向Url制定的页面  /// </summary>  /// <param name="url">连接地址</param>  public static void JavaScriptLocationHref(string url, Page page)  {  #region  string js = @"<Script language='JavaScript'>  window.location.replace('{0}');  </Script>";  js = string.Format(js, url);  //HttpContext.Current.Response.Write(js);  if (!page.ClientScript.IsStartupScriptRegistered(page.GetType(), "JavaScriptLocationHref"))  {  page.ClientScript.RegisterStartupScript(page.GetType(), "JavaScriptLocationHref", js);  }  #endregion  }    /**//// <summary>  /// 打开指定大小位置的模式对话框  /// </summary>  /// <param name="webFormUrl">连接地址</param>  /// <param name="width">宽</param>  /// <param name="height">高</param>  /// <param name="top">距离上位置</param>  /// <param name="left">距离左位置</param>  public static void ShowModalDialogWindow(string webFormUrl, int width, int height, int top, int left, Page page)  {  #region  string features = "dialogWidth:" + width.ToString() + "px"  + ";dialogHeight:" + height.ToString() + "px"  + ";dialogLeft:" + left.ToString() + "px"  + ";dialogTop:" + top.ToString() + "px"  + ";center:yes;help=no;resizable:no;status:no;scroll=yes";  ShowModalDialogWindow(webFormUrl, features, page);  #endregion  }    /**//// <summary>  /// 弹出模态窗口  /// </summary>  /// <param name="webFormUrl"></param>  /// <param name="features"></param>  public static void ShowModalDialogWindow(string webFormUrl, string features, Page page)  {  string js = ShowModalDialogJavascript(webFormUrl, features);  //HttpContext.Current.Response.Write(js);  if (!page.ClientScript.IsStartupScriptRegistered(page.GetType(), "ShowModalDialogWindow"))  {  page.ClientScript.RegisterStartupScript(page.GetType(), "ShowModalDialogWindow", js);  }  }