经过chrome查看response object内部结构

FB.api('/me/feed', 'post', { message: message_str }, function(response) {
							  if (!response || response.error) {
							  	console.log(response.error);
							  	alert(response.error.message);
							    // alert('Error occured');
							  } else {
							    alert('Successfully published!');
							  }
							});

要找到response里面包含了哪些对象，可以在里面加入console.log(response.error)，这样在chrome的Inspect Element里面的Console就可以看到object的结构了。

Ref:

http://stackoverflow.com/questions/10897544/fb-api-response-is-undefined

http://stackoverflow.com/questions/4743730/what-is-console-log-and-how-do-i-use-it