function compareWindow(url,id) {
  window.open(url,id,'toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=yes,copyhistory=no,width=100,height=100,screenX=150,screenY=150,top=150,left=150')
}

function update_on(obrazek) {
	document.getElementById( obrazek ).src='images/gfx/pprogress_on.gif';
}

function update_off(obrazek) {
	document.getElementById( obrazek ).src='images/gfx/pprogress_off.gif';
}