​x
 
<html>
<head>
<script type="text/javascript">
function setFocus()
  {
  document.getElementById('button1').focus()
  }
function removeFocus()
  {
  document.getElementById('button1').blur()
  }
</script>
</head>
<body>
​
<form>
<input type="button" id="button1" value="Button1" />
<br /><br />
<input type="button" onclick="setFocus()" value="Set focus" />
<input type="button" onclick="removeFocus()" value="Remove focus" />
</form>
​
</body>
</html>
​