function add_to_bag(n_article_id)
{	
	
	var option = document.getElementById('alternate_'+n_article_id); 
	
	if(option) 
		n_alternate_id = option.value;
	else 
		n_alternate_id = null;
	
	// volejme metodu process_ajax jenz obslouzi nas pozadavek
	x_process_ajax('class','bag','method','add_item','n_article_id',n_article_id,'n_alternate_id',n_alternate_id,view_bag); 
}

// callback funkce ktera vyplni zadany element
function view_bag(buffer)
{
	 document.getElementById('bag_info').innerHTML = ' ';
	 document.getElementById('bag_info').innerHTML = buffer;
}


// tato funkce se vola kdyz se meni polozka poctu kusu v kosi

function bag_count_change(action_url)
{
	var bag_form = document.getElementById('bag');
	
	bag_form.action = action_url;
	bag_form.submit();	
}


function add_to_compare(n_article_id)
{
	x_process_ajax('class','compare','method','add_item','n_article_id',n_article_id,view_compare);
}

function del_compare_item(n_article_id)
{
	x_process_ajax('class','compare','method','del_item','n_article_id',n_article_id,view_compare);
}

function view_compare(buffer)
{
	document.getElementById('compare_info').innerHTML = "";
	document.getElementById('compare_info').innerHTML = buffer;
}


function order_now()
{
  var inputs = Array('jmeno','prijmeni','ulice','mesto','psc','telefon');
 
  for(i=0; i<6; i++)
  {  	
  	if(!document.getElementById(inputs[i]).value)
  	{
  		alert("CHYBA: Neni vyplneno pole "+inputs[i]);
		return 0;
  	}
  }
    
  document.formular.submit();
}