<html>
<head>
<script language="JavaScript">
<!--
function reikna(Kvardi){
  if (Kvardi == 'F'){
    C = document.hiti.Celcius.value;
    document.forms['hiti'].Fahrenheit.value = C * 9/5 + 32;
  }
  else
  {
    F = this.hiti.Fahrenheit.value; 
    document.all['hiti'].Celcius.value = (F -32) * 5/9;
  }
}
// -->
</script>
<title>JavaScript - Dæmi 1</title>
</head>

<body>
<h2>Fyrsta dæmi um JavaScript og FORM</h2>
<form name="hiti">
<table>
<tr>
  <td align="left">Celcíus : <input type="Text" name="Celcius" size="10"></td>
  <td align="right">Fahrenheit : <input type="Text" name="Fahrenheit" size="10"></td>
</tr>
<tr>
  <td align="left"><input type="Button" value="Reikna Fahrenheit" onclick="reikna('F')"></td>
  <td align="right"><input type="Button" value="Reikna Celcíus" onclick="reikna('C')"></td>
</tr>
</table>
</form>
</body>
</html>