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,這里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); }