var obj = {

	a:"hello",

	b:"world",

	c:"hehe"

}

var key = 0;

for(var oj in obj) {

	console.log(oj);

	console.log(obj[oj]);

	key++;

}

console.log(key);

console.log(obj.size);

console.log(obj.length);

console.log(Object.keys(obj));

console.log(Object.keys(obj).length );