动态添加option及createElement使用示例

2019-11-20 21:11:49

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来源：转载

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<!DOCTYPE html> 
<html> 
<head> 
<title>select.html</title> 

<meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> 
<meta http-equiv="description" content="this is my page"> 
<meta http-equiv="content-type" content="text/html; charset=UTF-8"> 

<!--<link rel="stylesheet" type="text/css" href="./styles.css">--> 

</head> 

<body> 
<select id = "myCourse" onchange = "getCourse();"> 
<option value = "" selected>--请选择一门课程--</option> 
</select> 

<textarea id = "myares" rows="10" cols="30"></textarea> 
<script type="text/javascript" type = "text/javascript"> 
<!-- 
var last_select_num = 3;//加入从数据库中查询 

//动态添加第一门课程 
var myOption = document.createElement("option"); 
myOption.value = "java"; 
myOption.text = "java"; 
myCourse.add(myOption); 

//动态添加第二门课程、 
myOption = document.createElement("option"); 
myOption.value = "oracle"; 
myOption.text = "oracle"; 
myCourse.add(myOption); 

//动态添加第三门课程、 
myOption = document.createElement("option"); 
myOption.value = "javaEE"; 
myOption.text = "javaEE"; 
myCourse.add(myOption); 

function getCourse(){ 
myares.value += "你选择了："+myCourse.value +"/r/n"; 
} 
--> 
</script> 
</body> 
</html> 