title: Sum input fields by using javascript
body: <p>How could I sum the fields automaticly (by each function) to sum some input fields like this:</p>
  
  <pre><code>&lt;input name="price_1" id="price_1" type="text" value="50" /&gt;
  &lt;input name="price_2" id="price_2" type="text" value="40" /&gt;
  &lt;input name="price_3" id="price_3" type="text" value="20" /&gt;
  &lt;input name="price_4" id="price_4" type="text" value="10" /&gt;
  &lt;input name="price_5" id="price_5" type="text" value="80" /&gt;
  </code></pre>
  
  <p>Thank you very much if anyone has a suggestion?</p>