How to show image button when using jQuery Calendar DatePicker

<link rel="stylesheet" href="//code.jquery.com/ui/1.8.2/themes/sunny/jquery-ui.css">
 <script src="//code.jquery.com/jquery-1.10.2.js"></script>
 <script src="//code.jquery.com/ui/1.10.4/jquery-ui.js"></script>
 
<script type="text/jscript">
        $(function () {

            $("#<%= btnSubmit.ClientID %>").button({ icons: { primary: "ui-icon-gear", secondary: "ui-icon-triangle-1-s"} });
});
    </script>
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      <asp:Button ID="btnSubmit" runat="server" Text="Submit"/>