var FooterPosition=0;
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 getFooterPosition() {
	FooterPosition = getWindowHeight() - (document.getElementBiID("page").clientHeight + document.getElementBiID("container").clientHeight);
	return FooterPosition;
}