Question

How can I extract the value between the tags (49% in message) using Javascript?
I will first parse the JSON with JSON.parse.

{
      "id": "189180337778229046", 
      "from": {
        "name": "My FB page", 
        "category": "Automobiles and parts", 
        "id": "189180337778229046"
      }, 
      "subject": "A good deal", 
      "message": "<p><strong>49%</strong></p><p>This is a good deal for you.</p>", 
      "icon": "http://static.ak.fbcdn.net/rsrc.php/v1/yY/r/d1gBp2bDGEuh.gif", 
      "created_time": "2011-11-02T10:49:56+0000", 
      "updated_time": "2011-11-02T10:49:56+0000"
    }

Answer 1

A simple RegExp will do. Assume obj to hold the value of the parsed JSON string:

var percent = obj.message.match(/<strong>(.*?)<\/strong>/i)[1]; //Returns 49%