摘要： 1.动态创建selectfunction createSelect(){ var mySelect = document.createElement_x("select");mySelect.id = "mySelect";document.body.appendChild(mySelect);}2.添加选项optionfunction addOption(){//根据id查找对象，var obj=document.getElementByIdx_x('mySelect');//添加一个选项obj.add(newOption(" 阅读全文