That is because you are trying to connect the client-side scripts to your server-side scripts — while that is possible through Ajax requests, this is not going to work. What you should have done is, created a JavaScript function on the client-side and used that to handle the event.
function button87 () {
}
This will be executed one your table description cell gets a click on it. Note that, attaching a server-side event was done in ASP.NET Web Forms where you also had set
runat="server"
attribute to the elements. ASP.NET would then process the element on the server-side instead of the client-side. But if you are processing the element and handling the events on the client-side, you must write JavaScript (client-side) code to handle them too.
I have trusted MDN documentations for these years and I would recommend the same to you,
DOM on-event handlers - Web developer guides | MDN[
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