Switch positions of 2 divs with jQuery

I’ll throw in my solution

$('.div2:parent').each(function () {
    $(this).insertBefore($(this).prev('.div1'));
});

Edit: Doesn’t work for whitespace in div2. Here’s an updated solution:

$('.div2').each(function () {
    if (!$(this).text().match(/^\s*$/)) {
        $(this).insertBefore($(this).prev('.div1'));
    }
});