Failed to execute 'postMessage' on 'DOMWindow': The target origin provided ('http://example.com') does not match the recipient window's origin ('http://example.com').

I am using postMassage for communicating two different server data  using iframe. But i got an  Error Message


Failed to execute 'postMessage' on 'DOMWindow': The target origin provided ('http://domain.com') does not match the recipient window's origin ('http://domain.com').

In child domain Code

 window.parent.window.postMessage(
                    {'func': 'enquirydata', 'params': [pdata]},
            'http://example.com/'
                    );

Parent page Code



    function enquirydata(event) {
       
        var data = event.data;
        if (typeof (window[data.func]) == "function") {
            window[data.func].call(null, data.params[0]);
        }
    }