SQL Find The Element ID And Update Database - Get The ID Of The Div

Basically I've got an update query that runs when you click a submit button. I have an asp:Repeater in my page with a layer inside like this

<asp:Repeater id="dgBookings" runat="server" OnItemDataBound="ItemDB">
<itemtemplate>
<div class="bookingscontent">
<div class="bookingdetails" id="<%# DataBinder.Eval(Container.DataItem, "booking_ref") %>">
<p class="infotext"><%# DataBinder.Eval(Container.DataItem, "adults") %> <asp:LinkButton OnClick="EditDetails" Text="Edit..." runat="server"></asp:LinkButton></p>
<p class="infotext"><asp:LinkButton OnClick="SubmitDetails" Text="Submit..." runat="server"></asp:LinkButton></p>
</div>
</div>
</itemtemplate>
<asp:Repeater>

And it outputs HTML like this

<div class="bookingscontent">
<div class="bookingdetails" id="AL05720">
<p class="infotext">2</p>
<p class="infotext"> <a href="javascript:__doPostBack('dgBookings$ctl00$ctl08','')">Submit...</a></span> <a class="EditAdults" href="#" onclick="return false">Edit...</a></p>
</div>
</div>
<div class="bookingscontent">
<div class="bookingdetails" id="BD45670">
<p class="infotext">4</p>
<p class="infotext"> <a href="javascript:__doPostBack('dgBookings$ctl00$ctl08','')">Submit...</a></span> <a class="EditAdults" href="#" onclick="return false">Edit...</a></p>
</div>
</div>

Basically I need to get the ID of the div where the person has clicked submit and I can't figure out how. I want to put that ID into a string or a session so it can be used in SubmitDetails Sub