i enabled the partial rendering for the control from module definition.in this control page i am using another made user control.in this user control when a button clicked i show a popup by this way - in user control page ......

i omitted < nd > from the codes below to appear in this post......

script type="text/javascript"
     (function (a) { a.fn.Popup = function (h, j) { these codes for show popup did not show here .......... ;  
    });
   /script

 asp:Button ID="Button1" runat="server" onclick="Button1_Click" Text="Button"
div id="div_to_popup" style="display:none; background-color:White;color:Black;width:430px;height:300px;"

in code behind page -
private string getjQueryCode(string jsCodetoRun)
        {
            StringBuilder sb = new StringBuilder();
            sb.AppendLine("function pageLoad() {");  
            sb.AppendLine(jsCodetoRun);
            sb.AppendLine(" };");
            return sb.ToString();
        }
        private void runjQueryCode(string jsCodetoRun)
        {
            ScriptManager requestSM = ScriptManager.GetCurrent(Page);
            if (requestSM != null && requestSM.IsInAsyncPostBack)
            {               
                ScriptManager.RegisterStartupScript(this, typeof(Page), "Detail_Script", getjQueryCode(jsCodetoRun), true);
            }
            else
            {
                Page.ClientScript.RegisterStartupScript(this.GetType(), "Detail_Script", getjQueryCode(jsCodetoRun));
            }
        }
        protected void Button1_Click(object sender, EventArgs e)
        {
            Label1.Text = "done";
            runjQueryCode("$('#div_to_popup').Popup({ appendTo: 'form', zIndex: 2, closeClass: 'clickclose',modalColor: 'White', modalClose: false, scrollBar: true });");
        }

but when button clicked popup not shown only when i enable partial rendeding for the control..experts help me.......