jQuery(document).ready(function() {

  jQuery('#up').click(function() {

      var currval = jQuery('#quantitybox').val();
      currval++;

     var total = currval * 29.95;

     jQuery('#order_total').html(total.toFixed(2));
     jQuery('#o_total').val(total.toFixed(2));

     jQuery('#quantitybox').val(currval);
     
   });

  jQuery('#down').click(function() {

      var currval = jQuery('#quantitybox').val();
      currval--;

     if (currval < 0)
         currval = 0;

     var total = currval * 29.95;

     jQuery('#order_total').html(total.toFixed(2));
     jQuery('#o_total').val(total.toFixed(2)); 

     jQuery('#quantitybox').val(currval);

   });

   jQuery('#quantitybox').change(function() {

      var currval = jQuery('#quantitybox').val();

     if (currval < 0)
         currval = 0;

     var total = currval * 29.95;

     jQuery('#order_total').html(total.toFixed(2));
     jQuery('#o_total').val(total.toFixed(2));

     jQuery('#quantitybox').val(currval);

   });

});