Form on submit go to blank www

[rico769]

fino qui si apre su una nuova pagina ma non va al link


<script>// <=!=[=C=D=A=T=A=[
function mysubmit(){ window.location.href='test.com/'+document.getElementById('option').value; }
// ]=]=></script>


<form target="_blank"><select id="option" name="http://">
<option value="www.google.it">Option1</option>
<option value="http://www.yahoo.it">Option2</option>
<option value="value3.html">Option3</option>
<option value="value3.html">Option4</option>
<option value="value3.html">Option5</option>
</select>


<input id="submit" type="submit" value="Submit" />


</form>

nessuno mi aiuta?