<!doctype html>
<head>
<meta charset="utf-8">
<title>下拉框的测试</title>
</head>
<body>
<div > 请选择数据 <select id="select" οnchange="dataChange()"> <option id="netUsage" value ="netUsage">网络利用率</option> <option id="cpuUsage" value ="cpuUsage">CPU利用率</option> <option id="memoryUsage" value="memoryUsage">内存利用率</option>
</select>
</div>
<script type="text/JavaScript">
window.onload = function () {
document.getElementById('select').addEventListener('change',function(){
alert("当前选项是:"+this.value);
},true);
}
</script>
</body>
</html>
