/**
 * Get element By id
 */ 
function ge(o1, o2) {
  var obj = document;
  var poss;
  
  if(typeof(o1) == 'object') {
    obj = o1;
    poss = o2;
  }else {
    poss = o1;
  }
    
  return obj.getElementById(poss);
}

function hide(obj) {
	  obj.style.display = 'none';
	  return false;
	}

function show(obj) {
	  obj.style.display = 'block';
	  return false;
	}
	
	
function dopravaCheck(obj) {

  if(document.btnSub != 'empty' && obj.ship.value == 666 ) {
    alert('Vyberte způsob dopravy.');
    return false;
  } else {
    return true;
  }
}