https://www.889100.com/js/search.js

1//___ 市区町村リストを変更する
2function cityLiChg(){
3    var param, obj, re;
4
5    //param = 'ajax=1';
6    //obj = document.getElementById('pref_id');
7    //param += '&pref_id[]=' + obj.options[obj.selectedIndex].value;
8
9    obj = document.getElementById('pref_id');
10    param = '?pref_id=' + obj.options[obj.selectedIndex].value;
11
12    ajaxInitialize();
13    AJAX.open('POST', '/api/srchbox.html'+param);
14    AJAX.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
15    AJAX.send(param);
16    AJAX.onreadystatechange = function() {
17        if (AJAX.readyState == 4 && AJAX.status == 200) {
18            re = AJAX.responseText;
19            document.getElementById('city_li_field').innerHTML=re;
20        }
21    }
22}