function matchHeight() {
    var divs, contDivs, maxHeight, divHeight, d;

    // get all <div> elements in the document 

    divs = document.getElementsByTagName('div');

    contDivs = [];

    // initialize maximum height value 

    maxHeight = 0;

    // iterate over all <div> elements in the document 

    for (var i = 0; i < divs.length; i++) {

        // make collection with <div> elements with class attribute 'container'
        //if (/\bcontainer\b/.test(divs[i].className)) {

        // make collection with <div> elements with class attribute 'leftnav'
        // 'rightBody' 'rightcolumn' or 'middlecolumn'

        if ((divs[i].className == 'leftNav') ||
		(divs[i].className == 'rightBody') ||
		(divs[i].className == 'rightcolumn') ||
		(divs[i].className == 'middlecolumn')) {

            d = divs[i];

            contDivs[contDivs.length] = d;

            // determine height for <div> element

            if (d.offsetHeight) {
                divHeight = d.offsetHeight;
            }
            else if (d.style.pixelHeight) {
                divHeight = d.style.pixelHeight;
            }

            // calculate maximum height 

            maxHeight = Math.max(maxHeight, divHeight);
        }

    }

    // assign maximum height value to all of container <div> elements

    for (var i = 0; i < contDivs.length; i++) {

        if (contDivs[i].offsetHeight) {
            divHeight = contDivs[i].offsetHeight;
        }
        else if (contDivs[i].style.pixelHeight) {
            divHeight = contDivs[i].style.pixelHeight;
        }

        if (divHeight < maxHeight) {
            contDivs[i].style.paddingBottom = (maxHeight - divHeight) + "px";
        }
    }

}

window.onload = function() {

    if (document.getElementsByTagName) {
        matchHeight();

    }

}