Close the current window in javascript

killCurrentWindow.js

function killMe(event) {
    if (event.data === 'kill_me') {
        event.source.close();
    }
}

if (window.addEventListener){
    addEventListener('message', killMe, false);
} else {
    attachEvent('onmessage', killMe);
}

if (window.parent) {
    window.parent.postMessage('kill_me', '*');
}

window.open(window.location.href, '_new', 'resizable,width=800,height=400');