what do I put inside the asp button's OnClientClick to call my jquery function?

Also,I still want my button handler in asp.net to function

2. $('#btnNewBlock').click(function () {
3.             $('#pnlBuildBlockInsert').show()
4.  });
5. 
   
6. 
   
7. <asp:Button ID="btnNewBlock" runat="server" Text="New Block" Visible="true" OnClientClick="????"  />