title: count values of checked checkbox
body: <p>I want to get the total value of all checked checkboxes. What i've tried is this:</p>
  
  <pre><code>$("input[type=checkbox]:checked").each(function() {
              total_modules += parseFloat($(this).val());
          });
          $("#total_modules").text(total_modules.toFixed(2));
  </code></pre>
  
  <p>This didn't work.</p>
  
  <p>I hope someone can help me.</p>
  
  <p>Thanks in advance!</p>
  
  <p>PS: I fixed it, this is my new code:</p>
  
  <pre><code>function calculation()
      {
      $("input[type=checkbox]:checked").each(function() {
              total_modules += parseFloat($(this).val());
          });
          $("#total_modules").text(total_modules.toFixed(2)); 
      }
      calculation();
  
      $("input[type=checkbox]").click(function()
      {
          calculation();
      });
  </code></pre>
  
  <p>Thank you all</p>