function resizing(){
 cheight = window.innerHeight ? window.innerHeight : document.documentElement.clientHeight;


 if (cheight > 576)
	 document.body.style.height = cheight-((cheight - 576)/2);
 else
	 document.body.style.height = cheight;


 document.body.style.height = cheight-((cheight - 576)/2);


tmp = document.getElementById('nostra');

if (tmp)
 if (cheight > 576)
 	tmp.style.marginTop = ((cheight - 576)/2) + 'px';
 else
 	tmp.style.marginTop = '0';


}