How Can I Implement A JavaScript That Submit This Form According To The Clicket Button?

I have the following problem that I can't solve: I have this form into an HTML table:

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Alternatively, what you can do is, to give your buttons different id but same name.

<button id="accept" name="ctrl" value="Accept" type="submit" class="acceptButton">ACCEPT</button>
<button id="cancel" name="ctrl" value="Cancel" type="submit" class="cancelButton">CANCEL</button>
<button id="sap" name="ctrl" value="SAP" type="submit" class="sapButton">SAP</button>

Then you can check the form request which will contain your value with the same key:

ctrl:Accept
ctrl:Cancel
ctrl:SAP

If you have different names, you will have a different key for every button.