/*
  XDCommsChild - Cross Domain Communication, Child Object.

   Create this in the child window with the address of the xdomaincomms.html file on the same domain as the parent window
*/
var XDCommsChild = function(xdomaincommsAddress) {
    this.xdomaincommsAddress = xdomaincommsAddress;

    this.isIe = isInternetExplorer();


    if (isIe) {
        // need hidden frame for communication. IE8 is supposed to support postMessage, but I can't get it to work properly
        document.writeln("")
    }

    this.postBack = function(data) {
        if (isIe) {
            // this method tested against IE6,7 & 8
            window.open(this.xdomaincommsAddress + '#data=' + data, 'xdcomms'); // MUST use window.open. frame.src or frame.location both fail
        } else {
            // for everything else - tested against Firefox 3, Chrome, Safari
            window.opener.postMessage(data, '*'); // should really restrict the domain data can come from here
        }
    }

    this.postBackAndCloseWindow = function(data){
        this.postBack(data);
        setTimeout("window.close()", 200); // need to use a timeout to make sure the javascript in the frame has executed if we are using that communication model
    }
}

          
           var hash = null;

            function sendData() {
                hash = location.hash;
                if (hash != null && hash.length > 1) {
                    window.parent.opener.location.hash=hash;
                    location.hash = '#';
                }
            }

            setInterval("sendData()", 50);

/*
  XDCommsParent - Cross Domain Communication, Parent Object.

   Create this in the parent window with a callback function that will recieve data.
*/
var XDCommsParent = function(dataRecievedCallback) {
    this.dataRecievedCallback = dataRecievedCallback;
    
    this.isIe = isInternetExplorer();

    this.receiveMessage = function(event) {
        dataRecievedCallback(event.data);
    }

    if (this.isIe) {
        window.setInterval("pollForData()", 200);
    } else {
        window.addEventListener("message", this.receiveMessage, false);
    }

}

<button onclick="javascript:xDCommsChild.postBackAndCloseWindow(document.getElementById('thevalue').value);">Send to Parent Window</button>