Get the value from one window to another window - javascript

<input type="text" id="the_value" />
<a href="#" onclick="return updateURL()" id="the_link">Click me</a>
<script type="text/javascript">
function updateURL()
{
    document.getElementById('the_link').href =
        'site.com/index2.php?info=' +
        encodeURIComponent(document.getElementById('the_value'));
    return true;
}
</script>