function postContactForm(object_id) {

  var error = '';

  //var object_id 		= object_id;
  var name      			= $('par_name').value;
  var family_name  		= $('par_family_name').value;
  var date 						= $('par_date_y').value + '-' + $('par_date_m').value + '-' + $('par_date_d').value;
  var email     			= $('par_email').value;
  var phone						= $('par_phone').value;

  var sms_info 				= ($RF('contact_form_' + object_id, 'sms_info') == 1) ? 'ja':'nej';

  // checkboxes
  var intresse_musik			  		= $('par_musik').checked ?'ja':'nej';
  var intresse_konst						= $('par_konst').checked ?'ja':'nej';
  var intresse_film				    	= $('par_film').checked ?'ja':'nej';
  var intresse_foto				    	= $('par_foto').checked ?'ja':'nej';
  var intresse_design			  		= $('par_design').checked ?'ja':'nej';
  var intresse_idrott			  		= $('par_idrott').checked ?'ja':'nej';
  var intresse_radio			  		= $('par_radio').checked ?'ja':'nej';
  var intresse_cafe				  		= $('par_cafe').checked ?'ja':'nej';
  var intresse_spelningar				= $('par_spelningar').checked ?'ja':'nej';
  var intresse_utbildningar			= $('par_utbildningar').checked ?'ja':'nej';
  var intresse_arrangemang	  	= $('par_arrangemang').checked ?'ja':'nej';

  var message					= $('par_message').value;

  $('par_name').className = (!name) ? 'missing':'';
  if(!name) { error = 1; }
  $('par_family_name').className = (!family_name) ? 'missing':'';
  if(!family_name) { error = 1; }
  $('par_email').className = (!validateEmail(email)) ? 'missing':'';
  if(!email) { error = 1; }
  //$('par_phone').className = (!phone) ? 'missing':'';
  //if(!phone) { error = 1; }


  if(error == 1) {
    alert('Vänligen se över dina uppgifter och försök igen.');
  } else {

    /* mash form data into an array */
    var qs_data = new Hash();
    qs_data.set('par_name', name);
    qs_data.set('par_family_name', family_name);
    qs_data.set('par_date', date);
    qs_data.set('par_email', email);
    qs_data.set('par_phone', phone);
    qs_data.set('par_sms_info', sms_info);

    qs_data.set('par_intresse_musik', intresse_musik);
    qs_data.set('par_intresse_konst', intresse_konst);
    qs_data.set('par_intresse_film', intresse_film);
    qs_data.set('par_intresse_foto', intresse_foto);
    qs_data.set('par_intresse_design', intresse_design);
    qs_data.set('par_intresse_idrott', intresse_idrott);
    qs_data.set('par_intresse_radio', intresse_radio);
    qs_data.set('par_intresse_cafe', intresse_cafe);
    qs_data.set('par_intresse_spelningar', intresse_spelningar);
    qs_data.set('par_intresse_utbildningar', intresse_utbildningar);
    qs_data.set('par_intresse_arrangemang', intresse_arrangemang);

    qs_data.set('par_message', message);
    //alert(qs_data.toQueryString());

    var pars = 'action=process_signup_form_plantan&' + qs_data.toQueryString();

    new Ajax.Request('?',
    {
      method: 'post',
      postBody: pars,
      encoding: 'ISO-8859-1',
      onComplete: function(resp) {
        if (resp.status == 200) {
          $('contact_form_box' + object_id).innerHTML = 'Tack';
        }
      }
    });
  }
}