jQuery.extend({

  openloading: function (options) {

    var defaults = { msg: '数据提交中...', img: 'loading.gif' };

    var opts = $.extend(defaults, options);

    $("body").append("<div class='l_overlay' style='position:fixed;top:0;right:0;bottom:0;left:0;z-index:998;width:100%;height:100%;padding:0 20px 0 0;background-color:gray;display:none;'></div><div class='l_showbox' style='position:fixed;top:0;left:50%;z-index:1001;opacity:0;filter:alpha(opacity=0);margin-left:-80px;border:1px solid gray;font-size:12px;font-weight:bold;'><div class='loadingWord' style='width:122px;height:38px;line-height:38px;border:2px solid #D6E7F2;background:#fff;'><img style='margin:10px 8px 10px 8px;float:left;display:inline;' src='"+opts.img+"'>数据提交中...</div></div>");

    var h = $(document).height();

    $(".l_overlay").css({ "height": h, 'display': 'block', 'opacity': '0.4' });

    $(".l_showbox").stop(true).animate({ 'margin-top': (h / 2 - 58) + 'px', 'opacity': '1' }, 200);

  },

  closeloading: function () {

    $(".l_showbox").stop(true).animate({ 'margin-top': '250px', 'opacity': '0' }, 400);

    $(".l_overlay").css({ 'display': 'none', 'opacity': '0' });

    $(".l_overlay").remove();

    $(".l_showbox").remove();

  }

}); 

protected override void OnPreRender(EventArgs e)
{
  if (Page != null && !string.IsNullOrEmpty(TargetID))
  {
   TargetID = GetClientID(TargetID);     
   Page.ClientScript.RegisterClientScriptResource(typeof(Loading), "BoControl.Scripts.Jquery.js");     
   this.Page.ClientScript.RegisterStartupScript(typeof(string), "BoControl_" + this.ClientID, "$(\"#" + TargetID + "\").on(\"click\",function(){$.openloading({msg:\"" + Text + "\", img: \"" +Page.ClientScript.GetWebResourceUrl(this.GetType(), "BoControl.Images.loading.gif")+ "\"});});", true);   
}   
base.OnPreRender(e); } 

    /// <summary>
    /// 打开加载动画
    /// UpdatePanel注册
    /// </summary>
    /// <param name="panel">UpdatePanel对象</param>
    public void Open(UpdatePanel panel)
    {
      if (Page != null)
      {
        ScriptManager.RegisterStartupScript(panel, panel.GetType(), "openloading", "$.openloading({msg:\"" + Text + "\", img: \"" + Page.ClientScript.GetWebResourceUrl(this.GetType(), "BoControl.Images.loading.gif"); + "\"});", true);
      }
    }