Hello, take a look at these lines:
$('#messege_twit').keyup(function () { $('#messege_dlina').text($('#messege_twit').attr('value').length);
they count the number of characters in the text field and display the number of characters. The task is this, it is necessary that when typing 100 characters, the digit of the number of characters is tinted red, so that the person knows that he typed more than necessary.
Thank.