示例代码
下面的例子返回下拉列表中所有选项的文本：
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>小白教程(css5.net)</title>
<script>
function displayResult(selTag){
var x=selTag.options[selTag.selectedIndex].text;
alert("你选择了: " + x);
}
</script>
</head>
<body>
<form>
选择你最喜欢的水果:
<select onchange="displayResult(this)">
<option>Apple</option>
<option>Orange</option>
<option>Pineapple</option>
<option>Banana</option>
</select>
</form>
</body>
</html>
演示一下 ?