function swatchProvince(obj){
    var swatchProvince_callback= function(res){
        if(res!=null&&res.value){
            //alert(res.value);
            var cityCount= res.value.length;
            var  citySelHtml="<select name='city' id='city'>";
            for (i = 0; i < cityCount; i++) {
                var city=res.value[i];
                var cityName=city.CityName;
                var id=city.Id;
                
                citySelHtml+=" <option value=";
                citySelHtml+=id;
                citySelHtml+=">";
                citySelHtml+=cityName;
                citySelHtml+="</option>";
             }
            citySelHtml+="</select>";
            
            var cityobj = document.getElementById("cityTd");
            //alert(citySelHtml);
            cityobj.innerHTML=citySelHtml;
        }
    }
    var provinceId=obj.value;
    if (provinceId!=null&&provinceId!="") {
       ePaperNet.Web.user.officeadd.GetAreaCity(provinceId,swatchProvince_callback);
    }else{
       alert("输入错误！");
    }
}