title: javascript sum returning NaN error
body: <p>i have a javascript shopping basket, in which the sum is returning a NaN error,almost every time.
  in the code i have </p>
  
  <pre><code>    $('#add-to-basket select').selectbox();
      $('#contents select').selectbox().change(function (e) {
          var product = $(this).parents('.product');
          var ppu     = product.find('.ppu').val();
          product.find('.price .wrapper .value').text($(this).val() * ppu);
  
          var total   = 0;
  
          $('.product .price .value').each(function (index, value) {
              total += new Number($(value));
          });
  
          var form = $(this).parents('form');
          form.ajaxSubmit(function () {
          });
  
          $('#total .value').text(total);
      });
  </code></pre>
  
  <p>i tried using parsefloatm but still it dosn't work... </p>