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('container').offsetHeight;
 var footerElement = document.getElementById('footerLong');
 var footerHeight = footerElement.offsetHeight;
 if (windowHeight - (contentHeight + footerHeight) >= 0) {
 footerElement.style.position = 'absolute';
 footerElement.style.top = (windowHeight - footerHeight) + 'px';
 }
 else {
 footerElement.style.position = 'static';
 }
 }
 }
 }

 window.onresize = function() {
 setFooter();
 }
 
function addLoadEvent(func)
{    
    var oldonload = window.onload;
    if (typeof window.onload != 'function')
    {
        window.onload = func;
    } 
    else 
    {
        window.onload = function()
        {
            oldonload();
            func();
        }
    }
}

addLoadEvent(setFooter);