Сергей Соколов

var showSE = function( isSuccess, el) {
    el.parentNode.classList.remove('error');
    el.parentNode.classList.add('success');
    el.nextElementSibling.InnerHTML = isSuccess ? "" :  el.dataset.error;
  }
var showError = showSE.bind(null, false);
var showSuccess = showSE.bind(null, true);

var AllUsers = {
   777: {id: 777, name: "", email: ""},
   123: {id: 123, name: "", email: ""},
}

function AddUser(name, email, id) {
  AllUsers[ id] = {
    id: id,
    name: name,
    email: email
  }
}

var userId = 123, userEmail = "zuk@facebook.com";
AllUsers[ userId].email = userEmail;

var el = document.querySelector('input[type=submit]');

<?php
$filename = "test.mp4";
$cmd = sprintf('ffprobe -v quiet -show_streams -of json "%s"', $filename);
$output = array();
exec(  $cmd, $output);
$data = json_decode( implode('', $output));

$width = $height = 0;
if( $data  &&  isset($data->streams) && is_array($data->streams)  &&  count($data->streams)) {
	foreach( $data->streams AS $i => $stream) {
		if( isset( $stream->width, $stream->height)) {
			$width = $stream->width;
			$height = $stream->height;
			break;
		}
	}
}

echo "Video is ${width}x$height\n"; // Video is 400x224

SELECT 
  SUM( case Dev_Type = 'up' then 1 else 0 end) AS up,
  SUM( case Dev_Type = 'down' then 1 else 0 end) AS down
FROM Table

$('.my_plus').click(function() {
  var input = $(this).parent().find('.quant');
  input = input.val(
		(parseFloat(input.val()) + 1.22).toFixed(2)
	);
  input.change();
  return false;
});

function loop( a, b, inc, label) {
	for (; a < b; a += inc) document.write("" + label + a + "</br >");	
}

loop(1, 20, 1, "все числа: ");
document.write("</br >");
loop(1, 25, 2, "нечетные числа: ");