<FORM NAME="email">Wybierz adres: 
<SELECT NAME="nameSelection">
<OPTION SELECTED>
<OPTION>jan.kowalski@firma.pl
<OPTION>zenon.nowak@firma.pl
<OPTION>anna.zielinska@firma.pl
</SELECT>
<input type="Submit" value="Wyślij pocztę" 
 onclick=parent.location.href='mailto:'+document.email.nameSelection.options[document.email.nameSelection.selectedIndex].text >
</FORM>