What's the right way to access the data from a JavaScript object? -

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i have object:

var messages = {     "msg100": "message 100",     "msg101": "message 101",     "msg102": "message 102",     "msg103": "message 103", }

if want msg101 can using of these 2 methods:

messages.msg101 // or messages['msg101']

both return same value. so, method better use , why?

the first 1 more limited ( btw i'm sure it's dup).

var messages = {      "1": "message 103" }  alert(messages.1) //nope

as opposed :

var messages = {      "1": "message 103" }  alert(messages["1"]) //all ok

Deter