index.html

<!DOCTYPE html>
<html>

  <head>
    <title>Quick weight conversion</title>
    <script src="weight.js"></script>
    <link rel="stylesheet" type="text/css" href="weight.css" />
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <meta charset="utf-8">
    <link rel="icon" href="/favicon.ico" type="image/x-icon" />
    <link rel="shortcut icon" href="/favicon.ico" type="image/x-icon" />
  </head>

  <body onload="kg.value = defaultKg(); result.value = wordykg2stlb( parseFloat( kg.value ) )">
    <form oninput="result.value = wordykg2stlb( parseFloat( kg.value ) )">
      <p>
        <label for="kg">Kilograms</label><br /><input id="kg" type="number" step="any" min="0" name="kg" autofocus autocomplete="off"/>
      </p>
      <p>
        <output id="result" name="result"></output>
      </p>
    </form>
  </body>

</html>