web代码如下：
<!DOCTYPE html>
<html>
<head>
<title>jsTest02.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>
<script>
function a(){
var aa = 123456;
document.getElementById("aaa").value = aa;
}
function b(){
var bb = "你好，在吗？";
document.getElementById("aaa").value = bb;
}
window.onload=a;
</script>
<body onload="a()">
<input type="text" name="" id="aaa"><button onclick="b()">获取js里面的值</button>
</body>
</html>
代码运行效果显示如下：
