Need help for Validatating and submitting the form with Bootstrarp

Hi,
<div class="form-group" id="uN"> <label class="control-label" for="inputSuccess2">Input with success</label> <asp:TextBox ID="userName" CssClass="form-control" runat="server" ></asp:TextBox> <span id="spUn"></span> </div> <button type="button" class="btn btn-primary" id="btn1">Click me</button> <asp:Button ID="btn11" runat="server" CssClass="btn btn-info" Text="Save" /> Above code is working  when I click on "Click me" button. But this button is HTML I cannot write code behind for it. And if I click on "Save" button then ...