WEBCONTROL DATEPICKER WEBCONTROLLIBRARY

[assembly: System.Web.UI.WebResource("WebControlLibrary1.cal.popcalendar.js", "text/js", PerformSubstitution = true)]
[assembly: System.Web.UI.WebResource("WebControlLibrary1.cal.popcalendar.css", "text/css")]
[assembly: System.Web.UI.WebResource("WebControlLibrary1.cal.calendar.gif", "image/gif")]

   protected override void OnPreRender(EventArgs e)
        {
            string scriptName = "TextBoxDatePicker";
            if (!Page.ClientScript.IsClientScriptBlockRegistered(scriptName))
            {
                 string script = //"<link href='" + ResolveUrl("cal/popcalendar.css") + "' type=\"text/css\" rel=\"stylesheet\" />" +
                        "<script language=\"javascript\" src='" + ResolveUrl("cal/popcalendar.js") + "' type=\"text/javascript\"></script>";

                 string scriptStr = "javascript:return popUpCalendar(this, '" + ResolveUrl("cal") + "/', document.getElementById('" + getClientID() + @"'), '" + DateFormat + "')";
                 
                 Attributes.Add("ondblclick", scriptStr);    
                this.Page.ClientScript.RegisterClientScriptInclude(
               this.GetType(), "Test",
               Page.ClientScript.GetWebResourceUrl(this.GetType(),
               "WebControlLibrary1.cal.popcalendar.js")); 
                // create the style sheet control
                // and put it in the document header
                string csslink = "<link href='" +
                   Page.ClientScript.GetWebResourceUrl(this.GetType(),
                    "WebControlLibrary1.cal.popcalendar.css")
                   + "' rel='stylesheet' type='text/css' />";
                LiteralControl include = new LiteralControl(csslink);
                this.Page.Header.Controls.Add(include);     
            }

            base.OnPreRender(e);
        }