function txt (domena)
{
  if (document.getElementById("nad_h"))
  {
  
    var string1='<a href="'+domena+'" id="logo" title="Úvodní strana"><img src="'+domena+'/images/logo.gif" width="153" height="24" alt="Barvy laky Rozehnal" /></a>';
    //var string1='<a href="'+domena+'" title="Gastrotrs Hodonín"><img src="'+domena+'/images/logo.gif" width="242" height="160" alt="Gastrotrs Hodonín" /></a>';
    var myspan = document.getElementById("nad_h");
    myspan.innerHTML=string1;
  }
}