function fnNazorPrev(oid)
{
      fnQueryItem(oid,'prev');
}

function fnNazorNext(oid)
{
      fnQueryItem(oid,'next');
} 

function fnNewsLetterOrder()
{
  var edtNewsLetterOrder = document.getElementById('edtNewsLetterOrder');
  
  if (checkEmail(edtNewsLetterOrder.value))
  {
    fnSendNewsLetterRequest(edtNewsLetterOrder.value);
    edtNewsLetterOrder.value = '';
  }
    else
  {
    alert('Zadejte prosím platnou emailovou adresu');
  }

}


function fnSendNewsLetterRequest(myemail)
{
	var params = '';
	var code = '';
	var url = '';
			
	url = '/napojeni-cz/ajax-newsletter';

		
	params = '&mail='+myemail;	
	
		new Ajax.Request(
				url,
				{
					method: 'get',
					parameters: params,
					onLoading: function(){},
					onComplete : function(transport)
					{
						alert('Děkujeme, vaše registrace pro odběr newsletterů byla úspěšně provedena.');						
					}
				}
				);
}

function checkEmail(xval) 
{

var filter = /^([a-zA-Z0-9_.-])+@(([a-zA-Z0-9-])+.)+([a-zA-Z0-9]{2,5})+$/;
if (!filter.test(xval))  return false; else return true;

}

function fnQueryItem(oid,tx)
{
	var params = '';
	var code = '';
	var url = '';
			
	url = '/napojeni-cz/ajax-nazor';

		
	params = 'oid='+oid+'&tx='+tx;	
	
		new Ajax.Request(
				url,
				{
					method: 'get',
					parameters: params,
					onLoading: function(){},
					onComplete : function(transport)
					{
						var val = transport.responseText;
						document.getElementById('user-opinions').innerHTML = val;
					}
				}
				);
}

function fn01a(id)
{
	document.getElementById('td'+id).style.backgroundImage = document.  getElementById('td_hidden'+id).style.backgroundImage;
}
function fn01b(id)
{
	document.getElementById('td'+id).style.backgroundImage = 'url(/files/img/b'+ id +'.jpg)';
}
function fn01l(id)
{
	document.location.href = '/prinosy-napojeni/#section'+id;
}
function fnc01l(id)
{
	document.location.href = id;
}
function fnc01(id)
{
	document.getElementById('tda1').style.backgroundImage = 'url(/files/img/prev_'+ id +'.png)';
}
function fnc02(id)
{
	document.getElementById('tda2').style.backgroundImage = 'url(/files/img/order_'+ id +'.png)';
}
function fnc03(id)
{
	document.getElementById('tda3').style.backgroundImage = 'url(/files/img/next_'+ id +'.png)';
}