.div {
position: relative;
}
.div::after {
content: '';
position: absolute;
top: 0;right: 0;bottom: 0;left: 0;
}
function SelectFileChange()
{
var file = document.querySelector("input").files[document.querySelector("select").selectedIndex];
var reader = new FileReader();
reader.onload = function(e) {
document.querySelector("video").src = e.target.result;
};
reader.readAsDataURL(file);
}
window.open('http://vk.com/', '_blank');