function W3C_validation() {
    $.get(window.location.href, function (data) {
        $('<form />', {action: 'http://validator.w3.org/check', method: 'POST', enctype: 'multipart/form-data', target: '_top', css: {display: 'none'}})
            .append($('<input />', {type: 'hidden', name: 'fragment', value: data}))
            .append($('<input />', {type: 'hidden', name: 'prefill', value: '0'}))
            .appendTo($('body'))
            .submit()
            .remove();
    });
}