function setup_form() {
  $('#contact_form').submit(function() {
    $.post(document.location.href, $('#contact_form').serialize() + '&contact_submit=ajax', function(resp) { 
      if (resp == 'OK') {
        $('#contact_form').hide('medium', function() {
	  $('<p>Thanks for your message. You\'ll hear back from us soon!</p>').hide().insertAfter('#contact_form').show('medium');
        });
      } else if (resp) {
        $('#contact_errors').html(resp).slideDown('medium');
	$('#contact_form :submit').val('Send Message').removeAttr('disabled');
      } else
        $('#contact_form').replaceWith('<p>Error submitting form, please try again later.</p>');
     });
    $('#contact_errors').hide();
    $(':submit', this).val('Sending...').attr('disabled', 'disabled');
    return false;
  })
}
$(setup_form);