1.動態建立select
function createSelect(){
var mySelect = document.createElement(select);
mySelect.id = mySelect;
document.body.appendChild(mySelect);
}
2.添加選項option
function addOption(){
根據id尋找對象,
var obj=document.getElementById('mySelect');
添加一個選項
obj.add(new Option(文本,值));
}
3.刪除所有選項option
function removeAll(){
var obj=document.getElementById('mySelect');
obj.options.length=0;
}
4.刪除一個選項option
function removeOne(){
var obj=document.getElementById('mySelect');
index,要刪除選項的序號,這裡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; 序號,取當前選中選項的序號
var val = obj.options[index].value;
6.獲得選項option的文本
var obj=document.getElementById('mySelect');
var index=obj.selectedIndex; 序號,取當前選中選項的序號
var val = obj.options[index].text;
7.修改選項option
var obj=document.getElementById('mySelect');
var index=obj.selectedIndex; 序號,取當前選中選項的序號
var val = obj.options[index]=new Option(新文本,新值);
8.刪除select
function removeSelect(){
var mySelect = document.getElementById(mySelect);
mySelect.parentNode.removeChild(mySelect);
}