Question

I was going through this article http://dev.opera.com/articles/view/objects-in-javascript/
where I read “‘this’ keyword doesn’t always refer to the object on which a method is defined, but instead can change based on specific contexts.”
I couldn’t find any example in which ‘this’ does not refer to the object on a method is defined….please gimme an example if possible

Answer 1

There are many way to change context. jsfiddle

using bind: (not supported by older IE browsers (IE < 9))

    var obj = {}; 
    function fun1(){};
    obj2 = {};
    obj2.fun1 =  fun1.bind(obj);
    obj2.fun1(); // context inside fun1 would be obj.

Using apply or call.

var obj = {}; 
        function fun1(){};
        obj2 = {};
        obj2.fun1 =  function(){
            fun1.apply(obj, arguments);
            //or fun1.call(obj, ar1, arg2,...);
          };
        obj2.fun1(); // context inside fun1 would be obj.