Check if element is before or after another element in jQuery

Question

Let us suppose I have this markup

First
Hi
Hello
Second         


        

Answer 1

Here is a fiddle

$('p').each(function() {
    previousH3 = $(this).prevAll('h3');
    nextH3 = $(this).nextAll('h3');

    if (previousH3.length > 0 && nextH3.length > 0) {
        $(this).css('color', 'red')
    }

});