/*
  	updatet die amount-Felder von der Warenauswahl über "+" und "-"-Buttons
  */
  // method = "+" or "-"
  function updateAmount(num,method)
  {
  	if (method=="+")
	{
  		$('amount['+num+']').value++;
	}else{
		if ($('amount['+num+']').value>0) $('amount['+num+']').value--;
	}
  }
  
  
  function confirmDelete(txt)
  {
	 if (txt==undefined) var txt = "Wirklich löschen?";
  	 return confirm(txt);

  }
  
  function checkAGB()
  {
		//$('fix_error_box').style.display = "none";
	if ($('agb_accept').checked)
	{
		if(error_box_slide.open) error_box_slide.slideOut();
		return true;
	} else {
		showError('Sie müssen die AGB akzeptieren, um die Bestellung abzuschicken.');
		return false;	
	}
  }
  
  function showError(txt)
  {
	  //$('error_box').styles.visibility = 'visible';
	  $('error_box').innerHTML = txt;
	  error_box_slide.slideIn();  
  }
	
	function toggleKats(kat_id)
	{

		eval("slide_box_fx"+kat_id).toggle().chain(function (){switchImg('switch_'+kat_id);});	
	}
	
	
	function switchImg(element)
	{
		var path_array = $(element).src.split("/");
		var old_image = path_array[path_array.length-1];
		var up   = 'right_small.jpg';
		var down = 'down_small.jpg';
		var path = 'img/icons/';
		
		//var img = array( path+up, path+down );
		
		if( up ==  old_image )
		{
			$(element).src = path+down;
		}
		else
		{
			$(element).src = path+up;
		}
		
	}