Thanks a lot, It works nice.. .I made some changes to make it Limit for Title and for specific post type :) , dont forget to change Your-Post-Type-here by the post type you want.
here is the code…
add_action( 'admin_print_footer_scripts', 'check_title_length' );
function check_title_length() {
global $post_type;
if ('Your-Post-Type-here' != $post_type)
return;
?>
jQuery(document).ready(function ($) {
// Set your character limit
var count_limit = 70;
// Set the initial symbol count on page load
$('#title-wc span.number').text($('#title').val().length);
$('#title').on('keyup', function () {
var char_count = $(this).val().length;
var excerpt = $(this).val();
// Update the character count on every key up
$('#title-wc span.number').text(char_count);
if (char_count >= count_limit) {
$('#title-wc span.number').css('color', 'red');
$(this).val(excerpt.substr(0, count_limit));
} else {
$('#title-wc span.number').css('color', '');
}
}).after('<p id="excerpt-wc">Count: <span>0</span></p>');
});
<?php
}