Visual Debug of titles in a html page (copy / paste code in the js console on a site with jquery)

visual-debug-hx.js

$(':header').each(function (index) {
    $(this).css('border', '2px solid red')
        .css('background', '#393939')
        .css('color', 'white')
        .css('padding', '10px')
        .append(' [' + $(this).get(0).tagName + ']');
});