js 拒绝访问(没分了)

 function choosefile()
    {
        document.getElementById("ctl00_ContentPlaceHolder1_TabContainer1_TabPanel2_FULword").click();
        document.getElementById("ctl00_ContentPlaceHolder1_lbnlik").click();
    }  <span style="display:none;">
<asp:FileUpload ID="FULword" runat="server" Width="143px"  onkeydown= "event.returnValue=false; " onpaste= "return   false " />
</span> 
<asp:Button ID="btnUploadWord" runat="server" Text="Button" Width="63px" OnClientClick="return choosefile();" OnClick="btnok_Click"  />后台
protected void lbnlik_Click(object sender, EventArgs e)
        {
            fileupload();
            
        }