要素の高さ揃えたい

flattenHeights.js

function flattenHeight(elements) {

    var maxHeight, i, l, defaultView;

    maxHeight = 0;
    i = 0;
    l = elements.length;
    defaultView = document.defaultView || {};

    if (defaultView.getComputedStyle) {
        for (i = 0; i < l; i++) {
            maxHeight = Math.max(
                maxHeight,
                parseInt(document.defaultView.getComputedStyle(elements[i], '').getPropertyValue('height'), 10)
            );
        }
        for (i = 0; i < l; i++) {
            elements[i].style.height = maxHeight -
                parseInt(document.defaultView.getComputedStyle(elements[i], '').getPropertyValue('border-top-width'), 10) -
                parseInt(document.defaultView.getComputedStyle(elements[i], '').getPropertyValue('border-bottom-width'), 10) + 'px';
        }
    } else if (elements[0].currentStyle) {
        for (i = 0; i < l; i++) {
            maxHeight = Math.max(maxHeight, (function() {
                var element = elements[i],
                rect = element.getBoundingClientRect();
                return (element.offsetHeight || rect.bottom - rect.top);
            })());
        }
        for (i = 0; i < l; i++) {
            elements[i].style.height = (function() {
                var element = elements[i],
                style = element.currentStyle;
                return maxHeight -
                    (parseInt(style.borderTopWidth, 10) || 0) -
                    (parseInt(style.borderBottomWidth, 10) || 0) -
                    (parseInt(style.paddingTop, 10) || 0) -
                    (parseInt(style.paddingBottom, 10) || 0);
            })();
        }
    }
}