三级联动
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>三级联动</title>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js" type="text/javascript"></script>
</head>
<body>
<form method="get" onsubmit="" action="http://www.baidu.com">
<select name="City" id="City1"></select>
<select name="City" id="City2"></select>
<select name="City" id="City3"></select>
<input id="hidCity1" name="hidCity1" type="hidden" value="" />
<input id="hidCity2" name="hidCity2" type="hidden" value="" />
<input id="hidCity3" name="hidCity3" type="hidden" value="" />
</form>
<script type="text/javascript">
$(function () {
Rechange(0, "City1");//绑定第一级下拉列表
Rechange($("#City1").val(), "City2");//绑定第二级下拉列表
Rechange($("#City3").val(), "City3");//绑定第二级下拉列表
$("#City1").change(function () {
Rechange($("#City1").val(), "City2");
});
$("#City2").change(function () {
Rechange($("#City2").val(), "City3");
});
});
//上级ID 下级ID
function Rechange(rid, objid) {//citylist.html处理请求页面 返回 json: {ID:"",Title:""}
var list = $.ajax({ url: "/Citylist.html?rid=" + rid, async: false }).responseText;
list = eval("(" + list + ")");
$("#" + objid).empty();
for (var i = 0; i < list.length; i++) {
$("#" + objid).append("<option value='" + list[i].ID + "'>" + list[i].Title + "</option>");
}
}
</script>
</body>
</html>
