这篇文章主要为大家详细介绍使用原生js、或jquery来实现省市县三级联动下拉框的功能。具有一定的参考价值，感兴趣的小伙伴们可以参考一下
原生js的实现
<!DOCTYPE html>
<html>
<head>
<title></title>
<meta charset="utf-8">
</head>
<body>
<select>
<option>---请选择省---</option>
</select>
<select>
<option>---请选择市---</option>
</select>
<select>
<option>请选择县</option>
</select>
<script type="text/javascript">
var proArr = ["安徽","河南","河北","江苏"];
var cityArr = [
["合肥","蚌埠","亳州","阜阳"],
["郑州","开封","商丘","焦作"],
["石家庄","邯郸","衡水"],
["苏州","杭州","无锡","南京"]
]
var couArr = [
[
["合县1","合县2","合县3","合县4"],
["蚌县1","蚌县2","蚌县3","蚌县4"],
["亳县1","亳县2","亳县3","亳县4"],
["阜县1","阜县2","阜县3","阜县4"],
],
[
["郑县1","郑县2","郑县3","郑县4"],
["开县1","开县2","开县3","开县4"],
["商县1","商县2","商县3","商县4"],
["焦县1","焦县2","焦县3","焦县4"],
],
[
["石县1","石县2","石县3","石县4"],
["邯县1","邯县2","邯县3","邯县4"],
["衡县1","衡县2","衡县3","衡县4"],
],
[
["苏县1","苏县2","苏县3","苏县4"],
["杭县1","杭县2","杭县3","杭县4"],
["无县1","无县2","无县3","无县4"],
["南县1","南县2","南县3","南县4"],
],
]
var sltNope = document.getElementsByTagName("select");
var Index1 = 0;
createNope(proArr,0);
sltNope[0].onchange = function(){
sltNope[1].length = 1;
sltNope[2].length = 1;
Index = this.selectedIndex-1;
createNope(cityArr[Index],1);
}
sltNope[1].onchange = function(){
sltNope[2].length = 1;
createNope(couArr[Index][this.selectedIndex-1],2);
}
function createNope(Arr,sum){
for (x = 0;x<Arr.length;x++) {
var topy = document.createElement('option');
topy.innerHTML = Arr[x];
sltNope[sum].appendChild(topy);
}
}
</script>
</body>
</html>jquery的实现
<!DOCTYPE html>
<html>
<head>
<title></title>
<meta charset="utf-8">
<script type="text/javascript" src="jquery-3.1.1.js"></script>
</head>
<body>
<select>
<option>---请选择省---</option>
</select>
<select>
<option>---请选择市---</option>
</select>
<select>
<option>请选择县</option>
</select>
<script type="text/javascript">
var proArr = ["安徽","河南","河北","江苏"];
var cityArr = [
["合肥","蚌埠","亳州","阜阳"],
["郑州","开封","商丘","焦作"],
["石家庄","邯郸","衡水"],
["苏州","杭州","无锡","南京"]
]
var couArr = [
[
["合县1","合县2","合县3","合县4"],
["蚌县1","蚌县2","蚌县3","蚌县4"],
["亳县1","亳县2","亳县3","亳县4"],
["阜县1","阜县2","阜县3","阜县4"],
],
[
["郑县1","郑县2","郑县3","郑县4"],
["开县1","开县2","开县3","开县4"],
["商县1","商县2","商县3","商县4"],
["焦县1","焦县2","焦县3","焦县4"],
],
[
["石县1","石县2","石县3","石县4"],
["邯县1","邯县2","邯县3","邯县4"],
["衡县1","衡县2","衡县3","衡县4"],
],
[
["苏县1","苏县2","苏县3","苏县4"],
["杭县1","杭县2","杭县3","杭县4"],
["无县1","无县2","无县3","无县4"],
["南县1","南县2","南县3","南县4"],
],
]
createNope(proArr,0);
$("select")[0].onchange = function(){
$("select")[1].length = 1;
$("select")[2].length = 1;
Index = this.selectedIndex-1;
createNope(cityArr[Index],1);
}
$("select")[1].onchange = function(){
$("select")[2].length = 1;
createNope(couArr[Index][this.selectedIndex-1],2);
}
function createNope(Arr,sum){
$.each(Arr,function(index,value){
$("select").eq(sum).append("<option>"+value+"</option>");
})
}
</script>
</body>
</html>jquery的插件实现：
distpicker是一款可以实现中国省市区地址三级联动jQuery插件。它使用简单，简单设置即可完成中国省市区地址联动效果。
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