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)) {
            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++) {
        contDivs[i].style.height = maxHeight + 'px';
    }
}
// execute function when page loads 
window.onload = function() {
    if (document.getElementsByTagName) {
        matchHeight();
    }
}
function fnTrapKD(btn) {
    if (document.all) {
        if (event.keyCode == 13) {
            event.returnValue = false;
            event.cancel = true;
            btn.click();
        }
    }
}