fun的a属性怎么调用?
<script type="text/javascript">
function fun(){
var a=1;
function fun2(){
var a=2;
console.log();
}
fun2();
}
function sayHello(){
console.log(arguments[0], arguments[1], arguments[2]);
}
sayHello('Bob', 'Jack', 'Rose');// Bob Jack Rose
</script>