省级二级联动

一、调用citys里的3个js文件

二、页面调用

　　

<script type="text/javascript" src="<?=$C->SITE_URL?>js/jquery-1.8.0.min.js"></script>
<script src="<?=$C->SITE_URL?>js/jquery.doubleSelect.min.js"></script>
<script src="<?=$C->SITE_URL?>js/citys.js"></script>
<script src="<?=$C->SITE_URL?>js/Validform.js"></script>
<script>


$(document).ready(function () {
    $("#reg").Validform({
        tiptype:2,
        ajaxPost:false
    });
var options = {
<?php if (!empty($D->province_id) && !empty($D->city_id)) { ?>
    preselectFirst: <?=$D->province_id?>,
    preselectSecond: <?=$D->city_id?>
<?php  } ?>
};
$('#province').doubleSelect('city', selectoptions, options);
});
</script>
<span class="InfoEdit">
              <select name="province_id" id="province">
                  <option name="province_id" value="">
                      <?=empty($D->province_id) ? "--------" : $this->network->get_city_name_byid_p($D->province_id) ?>
                  </option>
              </select>
              <select name="city_id" id="city">
                  <option name="city_id" value="">
                      <?=empty($D->city_id) ? "--------" : $this->network->get_city_name_byid_c($D->province_id, $D->city_id) ?>
                  </option>
              </select>
</span>