1.動態創建select
function createSelect(){
var mySelect = document.createElement_x("select");
mySelect.id = "mySelect";
document.body.appendChild(mySelect);
}
2.添加選項option
function addOption(){
//根據id查找對象，
var obj=document.getElementByIdx_x('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.getElementByIdx_x('mySelect');
obj.options.length=0;
}
4.刪除一個選項option
function removeOne(){
var obj=document.getElementByIdx_x('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.getElementByIdx_x('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.getElementByIdx_x('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.getElementByIdx_x('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.getElementByIdx_x("mySelect");
mySelect.parentNode.removeChild(mySelect);
}