jquery操作select option选项方法示例

<select id="mySelect">
<option value="1">one</option>
<option value="2">two</option>
<option value="3">three</option>
</select>

//获取选中的value和text
$("#mySelect").val(); //获取选中记录的value值
$("#mySelect option:selected").text(); //获取选中记录的text值

//删除所有选项option
var obj = document.getElementById("mySelect");
obj.options.length = 0;

//删除选中选项option
var obj = document.getElementById("mySelect");
var index = obj.selectedIndex;
obj.options.remove(index);

//修改选中选项option
var obj = document.getElementById("mySelect");
var index = obj.selectedIndex;
obj.options[index] = new Option("three",3); //更改对应的值
obj.options[index].selected = true; //保持选中状态

var obj = document.getElementById("mySelect");
obj.parentNode.removeChild(obj); //移除当前对象