Odczyt wartość pola option na podstawie selectedIndex i wstawienie do pola hidden
<select name="stanowisko_sel" onchange="this.form.stanowisko.value =
this.options[this.selectedIndex].text">
<option value="1">Kierowca</option>
<option value="1">Budowlaniec</option>
</select>
<input maxlength="50" name="stanowisko" size="50" type="hidden" />var f = document.f2;
f.elements[i].options[Math.floor((f.elements[i].length-1)*Math.random())+1].selected=true;function dodajCombo(sel, dane) {
var tab_test = new Array();
var nr = 0;
sel.options[nr] = new Option("", "");
nr++;
cnt = dane.length;
for (i = 0; i & lt; cnt; i++) {
if (tab_test[dane[i].id] == undefined) {
tab_test[dane[i].id] = dane[i].name;
sel.options[nr] = new Option(dane[i].name, dane[i].id);
nr++;
}
}
}function wybierzWyszukany(nr) {
var el = document.getElementById("combo_osoba_" + nr);
var el2 = document.getElementById("zwyciezca_" + nr);
var el3 = document.getElementById("zwyciezcaid_" + nr);
var idx = el.selectedIndex;
if (idx < 0) return;
el2.value = el.options[idx].text;
el3.value = el.options[idx].value;
}function odznacz(form, fld_name) {
fld = form.elements[fld_name];
len = fld.length
for (i = 0; i < len; i++) {
if (fld.options[i].selected)
fld.options[i].selected = false;
}
}