function getWindowHeight() {
    var windowHeight = 0;
    if (typeof (window.innerHeight) == 'number') {
        windowHeight = window.innerHeight;
    }
    else {
        if (document.documentElement && document.documentElement.clientHeight) {
            windowHeight = document.documentElement.clientHeight;
        }
        else {
            if (document.body && document.body.clientHeight) {
                windowHeight = document.body.clientHeight;
            }
        }
    }
    return windowHeight;
}
function setFooter() {
    if (document.getElementById) {
        var windowHeight = getWindowHeight();
        if (windowHeight > 0) {
            var contentHeight = document.getElementById('contenitore').offsetHeight;
            var footerElement = document.getElementById('footer');
            var footerHeight = footerElement.offsetHeight;
            if (windowHeight - (contentHeight + footerHeight) >= 0) {
                footerElement.style.position = 'relative';
                footerElement.style.top = (windowHeight - (contentHeight + footerHeight)) + 'px';
            }
            else {
                footerElement.style.position = 'static';
            }
        }
    }
}
window.onload = function() {
    setFooter();
}
window.onresize = function() {
    setFooter();
}