<center>
<form method="post">
<select name="url" onchange="switchpage(this)">
<option value="" selected="selected">Redirect to...</option>
<option value="http://scripters.ning.com">Scripters</option>
<option value="http://www.facebook.com">Facebook</option>
<option value="http://www.myspace.com">MySpace</option>
</select>
</form>

<script language="javascript" type="text/javascript">
function switchpage(select) {
var index;
for(index=0; index
if(select.options[index].selected)
{
if(select.options[index].value!="")
window.location.href=select.options[index].value;
break;
}
}
</script></center>

Just copy and paste inside your text box