JS--添加option

发布时间：2023-09-06 01:28责任编辑：林大明关键词：暂无标签

	<!DOCTYPE html>
	<html lang="en">
	<head>
	<meta charset="UTF-8">
	<title>Title</title>
	<script>
	window.onload=function () {
	var sel= document.getElementById("demo");
	// name value
	sel.options.add(new Option("请选择",""));
	sel.options.add(new Option("name","id"));
	}
	function add(){
	var sel= document.getElementById("demo");
	sel.options.add(new Option("ss",""));
	}
	function dele(){
	var sel= document.getElementById("demo");
	sel.options.remove(1);
	}
	function deleAll(){
	var sel= document.getElementById("demo");
	sel.options.length=0;
	sel.options.add(new Option("请选择",""));
	}
	</script>
	</head>
	<body>
	<select style="width: 50px" id="demo">

	</select><br/>
	<input type="button" value="add" onclick="add()"><br/>
	<input type="button" value="dele" onclick="dele()"><br/>
	<input type="button" value="deleall" onclick="deleAll()"><br/>
	</body>
	</html>

JS--添加option

原文地址：http://www.cnblogs.com/czgxxwz/p/7985698.html