This is simple. All I want to do is insert a hidden column into an asp:Griview that I'll be able to access through javascript. Any pointers?
You can hide a column by setting its CssClass property, e.g:
<style>
.hidden {display:none;}
</style>
...
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="false">
<Columns>
<asp:BoundField DataField="Id" ItemStyle-CssClass="hidden"
HeaderStyle-CssClass="hidden" />
<asp:BoundField DataField="Title" />
</Columns>
</asp:GridView>