ajax repsonder

// for prototype.js http://api.prototypejs.org/ajax/Ajax/Responders/
// same can be done with http://api.jquery.com/Ajax_Events/

Ajax.Responders.register({
  onCreate: function(obj){
  //listen all ajax calls
      if(obj.parameters.something) {
      //find your ajax call from the haystack of all calls, by url or by some param whatever fits
          if(obj.parameters.something === 'your condition'){
              if(your.elements){
                  var names = your.elements.pluck('name');
                  var values = your.elements.pluck('value');
                  for(var x=0; x < names.length; x++)    {
                      obj.parameters[names[x]] = values[x];
                  }
                  obj.options.postBody = Object.toQueryString(obj.parameters);
              }
          }
      }
  }
});