javascript 小技巧

Code
<asp:HyperLink ID="HyperLinkReturn" NavigateUrl="javascript:window.history.go(-1);" Text="返回前页" Visible="false" runat="server" />


 /// <summary>
        /// Get/set the displaying text of content page header.
        /// </summary>
        public string Text { get; set; }

        protected void Page_Load(object sender, EventArgs e)
        {
            if (!Page.IsPostBack)
            {
                this.HyperLinkReturn.Visible = string.Compare(Request["returnable"], "true", true) == 0;
                if (!string.IsNullOrEmpty(Request["returnedurl"]))
                {
                    this.HyperLinkReturn.NavigateUrl = HttpContext.Current.Server.UrlDecode(Request["returnedurl"]);
                }
            }
        }