window.onload = window.onresize = function(){
$('login').style.left=((winSize()[0]-$size('login')[0])/2)+'px';
$('login').style.top=((winSize()[1]-$size('login')[1])/2)+'px';

$('footer').style.width=(winSize()[0])+'px';
$('footer').style.top=(winSize()[1]-$size('footer')[1]-16)+'px';
}