jQuery(function () {
  jQuery('.signup_commitment_link').livequery('click', function (){
    var reduction_id = jQuery('form:first').attr('action').split('/')[3];
    var params = {'reduction[id]': reduction_id };
    if( window['source_pattern']) { params['source'] = source_pattern; }
    window.location = jQuery(this).attr('href') + '?' + jQuery('form:first').serialize() + '&' + jQuery.param(params);
    return false; 
  });
});