function sameClicked(sender, fromfields, tofields) {
    if (sender.checked) {
        for (var index = 0; index < fromfields.length; index++) {
            var fromfield = fromfields[index];
            var tofield = tofields[index];
            var elto = document.getElementById(tofield);
            var elfrom = document.getElementById(fromfield);
            elto.value = elfrom.value;
            document.forms[0].elements[tofield].disabled = true;
        }
    } else {
        for (var index = 0; index < fromfields.length; index++) {
            var tofield = tofields[index];
            var elto = document.getElementById(tofield);
            document.forms[0].elements[tofield].disabled = false;
        }
    }
}

function addressChanged(chkboxid, fromfields, tofields) {
    sameClicked(chkboxid, fromfields, tofields);
}