0514课堂01

|--对象
var myObject = {};

<script type="text/javascript">
    var myObject = {}
    alert(typeof(myObject))
</script>

<script type="text/javascript">
    var person= {}
    person.name = "张三";
    person.age = "18";
    console.log(person);

</script>

var person= {
        name : "张三",
        age : 18,
        sex : "男",
        say : function(){
            return "我是中国人";
        }
    }
    alert(person.name+"说"+person.say());

    function add(){
         alert(1+2);
    }
    add();

function add1(x,y){
        alert(x+y);
    }
    add1(2,3);

function hanshu(x,y){
    return x+y;        
return是返回值
}
var jieshou = hanshu(5,6);
alert(jieshou);

var aa = 111;
function ceshi(){
    var aa = 222;
    var bb = 333;
    alert(aa);
    alert(bb);
}
ceshi();
输出函数时,函数内的局部变量优先于函数外的全局变量
alert(aa);
函数内的局部变量不影响函数外的变量

var attr = [1,2,3,4,5];
function hanshu(x){
    console.log(x);
}
hanshu(attr);