I want to add an extra text box when clicking on Add topic. I have tried to modify the next code, which is in wpforo/wpf-assets/js/frontend.js, in the line 41. 

	$( "#add_wpftopic" ).click(function(){

		$( ".wpf-topic-create" ).slideToggle( "slow" );

I tried to just add an alert to test if it was the right part of the code, but it does not seem like it. But I did not find any other part where there was an action assigned to "add_wpftopic", which is the ID of the button "Add topic".

Is it possible to add extra features to this button? My final intention is to add a drop-down list where the user will choose a product,  and then he will write the message.

Thanks!