var ElementMaxHeight = function() {
    this.initialize.apply(this, arguments);
}

ElementMaxHeight.prototype = {
    initialize: function(className) {
        this.elements = document.getElementsByClassName(className || 'maxheight');
        this.textElement = document.createElement('span');
        this.textElement.appendChild(document.createTextNode('A'));
        this.textElement.style.display = 'block';
        this.textElement.style.position = 'absolute';
        this.textElement.style.fontSize = '1em';
        this.textElement.style.top = '-1000px';
        this.textElement.style.left = '-1000px';
        document.body.appendChild(this.textElement);
        this.textElementHeight = document.getDimensions(this.textElement).height;
        var __object = this;
        var __checkFontSize = this.checkFontSize;
        this.checkFontSizeInterval = window.setInterval(function() { return __checkFontSize.apply(__object) }, 500);

        this.expand();

        // Refresh elements height onResize event
        var __expand = this.expand;
        if (window.addEventListener) {
            window.addEventListener('resize', function(event) { return __expand.apply(__object, [(event || window.event)]) }, false);
        } else if (window.attachEvent) {
            window.attachEvent('onresize', function(event) { return __expand.apply(__object, [(event || window.event)]) });
        }
    },

    expand: function() {
        this.reset();
        for (var i = 0; i < this.elements.length; i++) {
            this.elements[i].style.height = document.getDimensions(this.elements[i].parentNode).height + 'px';
        }
    },

    reset: function() {
        for (var i = 0; i < this.elements.length; i++) {
            this.elements[i].style.height = 'auto';
        }
    },

    checkFontSize: function() {
        var height = document.getDimensions(this.textElement).height;
        if (this.textElementHeight != height) {
            this.textElementHeight = height;
            this.expand();
        }
    }
}


if (!!document.evaluate) {
    document._getElementsByXPath = function(expression, parentElement) {
        var results = [];
        var query = document.evaluate(expression, parentElement || document,
      null, XPathResult.ORDERED_NODE_SNAPSHOT_TYPE, null);
        for (var i = 0, length = query.snapshotLength; i < length; i++)
            results.push(query.snapshotItem(i));
        return results;
    }
}

document.getElementsByClassName = function(className, parentElement) {
    if (!!document.evaluate) {
        var q = ".//*[contains(concat(' ', @class, ' '), ' " + className + " ')]";
        return document._getElementsByXPath(q, parentElement);
    } else {
        var children = (parentElement || document.body).getElementsByTagName('*');
        var elements = [], child;
        for (var i = 0, length = children.length; i < length; i++) {
            child = children[i];
            if (child.className.length != 0 &&
          (child.className == className ||
           child.className.match(new RegExp("(^|\\s)" + className + "(\\s|$)")))) {
                elements.push(child);
            }
        }
        return elements;
    }
}

document.getDimensions = function(element) {
    var display = element.style.display;
    if (display != 'none' && display != null) { // Safari bug
        return { width: element.offsetWidth, height: element.offsetHeight };
    }

    return { width: originalWidth, height: originalHeight };
}