var MAX_symbols=400;
var text;
function symbols ()
{
	if(document.getElementById('comment').value.length > MAX_symbols)
	{
		document.getElementById('comment').value = document.getElementById ('comment').value.substring(0, MAX_symbols);
		return;
	}

	var cont = MAX_symbols-document.getElementById('comment').value.length;

	document.getElementById('symbols').innerHTML = cont;
}