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html select 省市联动js实现

时间:2021-08-04 15:53:16      阅读:11      评论:0      收藏:0      [点我收藏+]

html select 省市联动js实现

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<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<script>
			       var proArray = ["河南","山西","湖北"];
			        var cityArray = [["郑州","洛阳","开封"],["忻州","太原","晋城","运城"],["保定","武汉","咸宁"]];
			        function showPro(){
			            var pro = document.getElementById("pro");
			            for(var i=0;i<proArray.length;i++){
			                var opt = new Option();
			                opt.text = proArray[i];
			                pro.options.add(opt);
			            }
			        }
			        function showCity(){
			            var city = document.getElementById("city");
			            var pro = document.getElementById("pro");
			            var index = pro.selectedIndex;
			            city.options.length = 0;
			            for(var i=0;i<cityArray[index].length;i++){
			                var opt = new Option();
			                opt.text = cityArray[index][i];
			                city.options.add(opt);
			            }
			        }
		</script>
	</head>
	<body onload="showPro(),showCity()" >
			<select size="1" id="pro" onchange="showCity()">
				
			</select>省
			<select id="city" size="1">
				
			</select>市
	</body>
</html>
```![](https://img2020.cnblogs.com/blog/1946364/202108/1946364-20210804135229847-1317538019.png)

html select 省市联动js实现

原文:https://www.cnblogs.com/yue1234/p/15098536.html

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