function really(t,ln) {
  if (!window.confirm('Opravdu odebrat '+t+'?')) return;
  window.location=ln;
}
String.prototype.trim = function(){return this.replace(/(^\s*)|(\s*$)/g, "")};
function blkemp(e){var t1=document.getElementById(e);if(t1==undefined)return;
  t1.className = t1.className.toLowerCase();
  o=t1.value.trim().length>0;
  i=strpos(' '+t1.className+' ', ' must ');
  if((i===false) && !o)  t1.className = t1.className + ' must';
  else if((i!==false) && o)  t1.className = (' '+t1.className+' ').replace('must', ' ').trim();
}
function checkall(){
  var ids=[];var t,a,s='Nemáte vyplněny všechy povinné položky';
  ids[0]='jmeno';
  ids[1]='prijmeni';
  ids[2]='ulice';
  ids[3]='mesto';
  ids[4]='psc';
  ids[5]='tel';
  for(a=0;a<ids.length;a++){
    t=document.getElementById(ids[a]);
    if(t==undefined) {alert(s);return false;}
    if(t.value.trim().length==0) {alert(s);return false;}
  }
  var t1 = document.getElementById('dob');
  var t2 = document.getElementById('fak');
  chk=false;
  if (t1!=undefined) chk=chk|t1.checked;
  if (t2!=undefined) chk=chk|t2.checked;
  if (!chk){alert(s);return false;}

  sl=false;
  for (i=0; i<document.forms['delivery'].dlv.length; i++){if(document.forms['delivery'].dlv[i].checked)sl=true;}
  if (!sl){alert(s);return false;}
  return true;
}