How do I call MVC Controller from with Javascript function

[eluser]NeoArc[/eluser]
I did not understood your problem correctly, but, you can try using an AJAX enabled Framework, as jQuery:

Code:

jQuery("#form_id").submit(function(e){
  //We detect the submit event, and instead, we request the update using an xmlhttprequest object
  jQuery.post('/base/process/',jQuery("#form_id").serialize(), function(response){
    if(response=='ok'){ alert('ok');}
    else { alert('Not ok'); }
  });
  
  e.preventDefault(); //Do not submit the form.
});