Use of For each and found in javascript Objects

First there is a mistake in syntax.

var attr={node:1;value:"2"}

use ,

I think forEach is available only for Arrays.

{node:1,value:"2"}

is an object. To make it an array, just wrap it with "[]"

[{node:1,value:"2"}]

Check this and let me know... below is a working example tested with Firefox.

var obj = [{name:"John",age:25}];
    obj.forEach(function(person){
      alert(person.name+" is "+person.age+" years old");
    });