1.动态创建select 代码如下: function createSelect(){ var mySelect = document.createElement_x(“select”); mySelect.id = “mySelect”; document.body.appendChild(mySelect); } 2.添加选项option 代码如下: function addOption(){ //根据id查找对象, var obj=document.getElementByIdx_x(‘mySelect’); //添加一个选项 obj.add(new Option(“文本”,”值”