Very simple match heights function. Sets all elements height to the largest of its kind.

matchHeights.js

function matchHeights(selector) {
    $(selector).height('');
    var maxHeight = 0;
    $(selector).each(function (idx, item) {
        if ($(item).outerHeight() > maxHeight) {
            maxHeight = $(item).outerHeight();
        }
    });
    if (maxHeight > 0) {
        $(selector).outerHeight(maxHeight);
    }
}