Code
<html>
<head>
<title>jquery 操作 Select</title>
<script type=”text/javascript” src=”jquery-1.2.6.min.js”></script>
<script type=”text/javascript”>
$(document).ready(function(){
var oSheng = $(“#sheng”);
var dSheng = {head:[
{text:"text - a",id:"a"},
{text:"text - b",id:"b"}
]};
oSheng.empty();//清空select下拉框
for(var i=0;i<dSheng.head.length;i++){
$(“<option value=’” + dSheng.head[i].id + “‘>” + dSheng.head[i].text + “</option>”).appendTo(oSheng)//动态添加Option子项
}
var dShi = {head:[
{id:"sub - a - 1",value:"a1",parentid:"a"},
{id:"sub - a - 2",value:"a2",parentid:"a"},
{id:"sub - b - 1",value:"b1",parentid:"b"},
{id:"sub - b - 2",value:"b2",parentid:"b"},
{id:"sub - b - 3",value:"b3",parentid:"b"}
]}
var oShi = $(“#shi”)
oSheng.change(function(){//添加onchange事件
oShi.empty();//清空下级下拉框
for(i=0;i<dShi.head.length;i++){
if (dShi.head[i].parentid==oSheng.val())
{
$(“<option value=’” + dShi.head[i].value + “‘>” + dShi.head[i].id + “</option>”).appendTo(oShi)
}
}
})
})
</script>
</head>
<body>
<select id=”sheng”>
<option value=”a1″>——–</option>
</select>
<select id=”shi”>
<option value=”b1″>????????</option>
</select>
</body>
</html>
http://www.cnblogs.com/yjmyzz/archive/2008/10/09/1307552.html