js打印数组,js打印对象的方法

//打印对象

function writeObj(obj){

var description = "";

for(var i in obj){ 

var property=obj[i]; 

description+=i+" = "+property+"\n"; 

} 

alert(description);

}

//打印数组

function print_array(arr){

    for(var key in arr){

        if(typeof(arr[key])=='array'||typeof(arr[key])=='object'){//递归调用  

            print_array(arr[key]);

        }else{

            document.write(key + ' = ' + arr[key] + '<br>');

        }

    }

}

var a=new Array(0,1,2,3,4,new Array('dog','cat','mao'));

print_array(a);