string replace javascript/jquery

[{"fi开发者_运维问答eld":"Comment","message":"Message cannot be empty"}]

In the above string i want to replace the word comment. I dont wish to use any other external libraries expect jquery

Suppose you're talking about array object:

var array = [{"field":"Comment","message":"Message cannot be empty"}];

Then what you need is:

array[0]["field"] = "other value comes here";

Live test case: http://jsfiddle.net/yahavbr/7Xgwk/
(Click "View", click "Change" and click "View" again)

javaScript replace() Method

Example code :

<script type="text/javascript">

var str="Visit Microsoft!";
document.write(str.replace(/microsoft/i, "W3Schools"));

</script>