ronka

var regex = /^0(5[^7]|[2-4]|[8-9]|7[0-9])[0-9]{7}$/;
regex.test('123456789'); // false
regex.test('0778330035'); // true

ronka

::selection {
    background-color: #407ab1;
    color: #ffce00;
}

ronka

var speed = 2;
var iframe = document.getElementById('iframe_player');
var innerDoc = iframe.contentDocument || iframe.contentWindow.document;
innerDoc.getElementsByTagName('video')[0].playbackRate = speed;