gridview using footbale jquery plugin in design query?

hi,

I am using jquery footable plugin to present gridview data on mobile

my problem is I want to remove gridlines and change header but the CSS footable class includes default.

even If i put Gridlines none they still show??
    <asp:GridView ID="GridView1" CssClass="footable" runat="server" AutoGenerateColumns="false" onrowdatabound="GridView1_RowDataBound"   Width="100%" GridLines="None" BorderColor="#CCCCCC">