function openfoto()
  {
  w = 800+20;
  h = 600+30;
  var x = (screen.availWidth - w) / 2;
  var y = (screen.availHeight - h -100) / 2;
  newwin=window.open('','foto', 'width='+ w +',height='+ h +',left='+ x +',top='+ y +',resizable=0,location=0,directories=0,status=0,menubar=0,scrollbars=0,toolbar=0');
  newwin.focus();
  }
		
function on(x)
  {
		document.getElementById('mainimg').src='../foto/main/'+x;
		}

function off(x)
  {
		document.getElementById('mainimg').src='../foto/'+x;
		}

var aktfoto='';
function imgSet() {	aktfoto=document.getElementById('mainimg').src; return false;}
function imgOff() {document.getElementById('mainimg').src=aktfoto;}
function imgOn(x)
  {
		if (aktfoto=='') aktfoto=document.getElementById('mainimg').src;
		document.getElementById('mainimg').src='../foto/'+x;
		}