Sync multiple select
Using jQuery to sync two multiple selects
by Michel Plungjan
HTML
<select id="foo" multiple="multiple">
<option value="1">Option 1</option>
<option value="2">Option 2</option>
</select>
<select id="bar" multiple="multiple">
<option value="1">Opt 1</option>
<option value="2">Opt 2</option>
<option value="3">Opt 3</option>
<option value="4">Opt 4</option>
</select><br />
<a href="#" id="sel">Sync</a>
CSS
a { text-decoration:none}
JavaScript
$("#sel").click(function(e) {
$("#bar").val($("#foo").val());
return false;
});