<select id="mySelect">
<option value="1">one</option>
<option value="2">two</option>
<option value="3">three</option>
</select>
则可通过以下script代码s来获取选中的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
2、运用new Option("文本","值")方法添加选项option
var obj = document.getElementById("mySelect")
obj.add(new Option("4","4"))
3、删除所有选项option
var obj = document.getElementById("mySelect")
obj.options.length = 0
4、删除选中选项option
var obj = document.getElementById("mySelect")
var index = obj.selectedIndex
obj.options.remove(index)
5、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
6、删除select
var obj = document.getElementById("mySelect")
obj.parentNode.removeChild(obj)//移除当前对象
7、select选择的响应事件
$("#mySelect").change(function(){
//添加所需要执行的操作代码
})
<script type="text/javascript">function addList(){
var list = document.getElementById("list")
var bb=["javascript1","javascript2","javascript3","javascript4"]
for(var i = 0i <bb.lengthi++){
var newOption = document.createElement("option")
newOption.setAttribute("value", i)
newOption.appendChild(document.createTextNode(bb[i]))
list.appendChild(newOption)
}
}
function clearList(){
var list = document.getElementById("list")
for(var i = list.options.lengthi >= 0i--){
list.remove(i)
}
}
</script>
</head>
<body>
<select name="list" id="list" style="width:120px">
</select>
<input type="button" onclick="addList()" value="生成"/>
<input type="button" onclick="clearList()" value="清空" />
</body>
