dotNetHell.it - Forum - Codice Sorgente

<html>
  <head>
    <title>Somam select</title>
    <script type="text/javascript">
      function selectValue(caller)
      {
        document.getElementById("txtRisultato").value = parseInt(document.getElementById("select1").value) + parseInt(document.getElementById("select2").value);
      }
    </script>
  </head>
  <body>
    <select id="select1" OnChange="javascript: selectValue(this);">
      <option value="0">0</option>
      <option value="1">1</option>
      <option value="2">2</option>
    </select>
    <select id="select2" OnChange="javascript: selectValue(this);">
      <option value="0">0</option>
      <option value="1">1</option>
      <option value="2">2</option>
    </select>
    <input type="text" value="0" id="txtRisultato" />
  </body>
</html>