function onphoto(i){
	var z=document.getElementById('doc');
	var w=document.getElementById('sloy');
	w.style.display="block";
	z.style.display="block";
	z.style.backgroundImage="url(doc/"+i+".jpg)";
}
function off(){
	var z=document.getElementById('doc');
	var w=document.getElementById('sloy');
	w.style.display="none";
	z.style.display="none";
}