JS创建HTML控件并动态生成页面的写法

之前都是直接写标签。用JS动态生成一个控件方法如下(INPUT SELECT):

//车牌种类的
var divCarType=document.getElementById('divCarType');
var objCarType=document.createElement('select');
objCarType.setAttribute("type", "text");
objCarType.setAttribute('id','carType');
objCarType.setAttribute('class','inp_1');
divCarType.appendChild(objCarType);

//创建一个车牌号
var divVehicleNumber=document.getElementById('divVehicleNumber');
var objVehicleNumber=document.createElement("input");
objVehicleNumber.setAttribute("type", "text");
objVehicleNumber.setAttribute("id","vehicleNumber");
objVehicleNumber.setAttribute("maxlength","7");
objVehicleNumber.setAttribute("placeholder","字母+5位数字或字母");
objVehicleNumber.setAttribute("style","width:90%;");
objVehicleNumber.setAttribute("class","inp_1");
divVehicleNumber.appendChild(objVehicleNumber);