function ControlNumber(){
     if ((event.keyCode <48) || (event.keyCode >57)) event.returnValue = false;
}

function otevriOkno(adr){
	window.open(adr,'Okno','toolbar=0,location=0,menubar=1,scrollbars=1,width=350,height=250,resizable=1,top=20,left=20')
}