模态对话框对父页面控件回写值

            父页面：
     String url = "../Public/xxxx.aspx?";
            StringBuilder script = new StringBuilder();
            script.Append("<script language=javascript>window.showModalDialog('");
            script.Append(url);
            script.Append("'+'&tempRandom='+Math.random()");
            script.Append(",[document.getElementById('" + this.hdnIsOpen.ClientID + "')"); //回写值1,hdnIsOpen是server 端控件
            script.Append(",document.getElementById('" + this.hdnBu.ClientID + "')");  //回写值2
            script.Append(",document.getElementById('" + this.hdnOu.ClientID + "')]"); //回写值3
            script.Append(",'dialogHeight:500px;dialogWidth:900px');");
            script.Append("</script>");
     Page.RegisterStartupScript("ShowBuOu", script.ToString());

            弹出模态对话框页面：点确认回写值，关闭
                StringBuilder sb = new StringBuilder();
                sb.Append("<script language=javascript>");
                sb.Append("dialogArguments[0].value='N';"); // dialogArguments[0]这是传过来的参数hdnIsOpen,可以对它做作
                sb.Append("dialogArguments[1].value='" + bu + "';");
                sb.Append("dialogArguments[2].value='" + ou + "';");               
                sb.Append("window.close();");
                sb.Append("</script>");
               
                this.ClientScript.RegisterStartupScript(this.GetType(), "Show", sb.ToString());