1.動態創建select
- function createSelect(){
- mySelect = document.createElement("select");
- mySelect.id = "mySelect";
- document.body.appendChild(mySelect);
- }
2.添加選項option
function addOption(){
var obj=document.getElementById(“mySelect”);
//添加一個選項
obj.add(new Option("文本","值")); //這個只能在IE中有效
obj.options.add(new Option("text","value")); //這個兼容IE與firefox
}
Option裏面的四個參數分別的意思
new Option(text,value,defaultselected,selected)
new Option(文本,值,默認選中的項,選中的項)
new Option("男","1",false,false)
3.刪除所有選項
function removeAll(){
var obj=document.getElementById('mySelect');
obj.options.length=0;
}
4.刪除一個選項
function removeOne(){
var obj=document.getElementById('mySelect');
//index,要刪除選項的序號,這裏取當前選中選項的序號
var index=obj.selectedIndex;
obj.options.remove(index);
}
5.獲得選項Option 的值
var obj=document.getElementById("mySelect");
var index=obj.selectedIndex;
var value = obj.options[index].value;
6.獲得選項Option 的文本
var obj = document.getElementById("mySelect");
var index= obj.selectedIndex;
var text=obj.options[index].text;
7.修改選項option
var obj=document.getElementById("mySelect");
var index=obj.selectedIndex;
obj.options[index].value="0";
obj.options[index].text ="女";
obj.options[index]=new Option("0","女");
8.刪除select
var mySelect=document.getElementById("mySelect");
mySelect.parentNode.removeChild(mySelect);