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 browser doesn't get 'getElement...'
if (!document.getElementById)return false;
//check existance of element b4 proceeding
//if (!document.getElementById("contentWrap"))return false;

if (document.getElementById) {
var windowHeight=getWindowHeight();
if (windowHeight>0) {
if(document.getElementById("frontHead")){
var contentHeight = document.getElementById('frontWrap').offsetHeight + document.getElementById('frontHead').offsetHeight;
//alert("front");
//alert(windowHeight);
} else if (document.getElementById("headWrap")){
var contentHeight = document.getElementById('contentWrap').offsetHeight + document.getElementById('headWrap').offsetHeight;
//alert("inner");
}
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();
}