浪費了“黃金五年”的Java程式設計師，還有救嗎？ >>>   

var provinceObj = document.getElementById("province").options;
for (var i=0; i<provinceObj.length; i++) {
    if (provinceObj[i].value == province) {
        provinceObj[i].selected = true;
        break;
    }
}


var pname = pro_select.value;
city_select.innerHTML = "<option>--選擇市--</option>";
//遍歷城市列表
for (var j in city) {
    if (pname == city[j].pname) {
        var opt = document.createElement("option");
        opt.innerText = city[j].cname;
        opt.setAttribute("value", city[j].cname);
        city_select.appendChild(opt);
    }
}
var city1 = '${data.city!}';  //Struts2中從實體中取值
var cityObj = document.getElementById("city").options;
for (var i=0; i<cityObj.length; i++) {
    if (cityObj[i].value == city1) {
        cityObj[i].selected = true;