javascript 块级作用域
(function () { for (var i=0; i count; i++){ alert(i); } })();
<html>
<head>
<title>Block Scope Example</title>
</head>
<body>
<script type="text/javascript">
function outputNumbers(count){
(function () {
for (var i=0; i < count; i++){
alert(i);
}
})();
alert(i); //causes an error
}
outputNumbers(5);
</script>
</body>
</html>
