<HTML>
<HEAD>
<SCRIPT LANGUAGE="JavaScript"><!--
function copyForm() {
    var i = opener.document.testForm.tipo.length;
    var myNewOption = new Option(window.document.popupForm.myTextField.value, i+1, true);
    parent.opener.document.testForm.tipo.options[i+1] = myNewOption;
    //parent.opener.document.hiddenForm.tipo.selectedIndex = i+1;
    window.close();
    return false;
}
//--></SCRIPT>
</HEAD>
<BODY>
<FORM NAME="popupForm">
<INPUT TYPE="TEXT" NAME="myTextField">
<INPUT TYPE="BUTTON" VALUE="Submit" onClick="copyForm()">
</FORM>
</BODY>
</HTML>