ovviamente SI:
codice:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>test</title>
<script language="javascript">
	function moveItem(theListBox)
	{
		if(theListBox.selectedIndex == -1)
			return false;
			
		txtArea.value += theListBox.options[theListBox.selectedIndex].label + "; ";
		theListBox.options[theListBox.selectedIndex] = null;
	}
</script>
</head>

<body>


<select name="myListbox" size="10"> 
	<option label="Valore 1" value="1">Valore 1</option>
	<option label="Valore 2" value="2">Valore 2</option>
	<option label="Valore 3" value="3">Valore 3</option>
	<option label="Valore 4" value="4">Valore 4</option>
	<option label="Valore 5" value="5">Valore 5</option>
</select> 
<input type="button" value=">>" id="myCmd" onClick="Javascript:moveItem(myListbox);">
<textarea id="txtArea" rows="10" cols="20"></textarea>
</body>
</html>
saluti..