Someone

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>

<head>
<title>Untitled</title>
<script type="text/javascript">
function link()
{
  document.getElementById('field1').value = this.innerHTML;
}
</script>
</head>

<body>
<input type="text" size="30" id="field1">
<br>
<a href="#" onclick="link();">handle 1</a>
<a href="#" onclick="link();">handle 2</a>
<a href="#" onclick="link();">handle 3</a>
</body>

</html>