var arrow_up = new Image();
arrow_up.src = "images/arrow_przyc_up.png";
var arrow_down = new Image();
arrow_down.src = "images/arrow_przyc.png";

function slide_porady(index)
{	
	var lista = document.getElementById('porady_list');
	var li_tags = lista.getElementsByTagName('li');

	if(document.getElementById('dd'+index).style.display == 'none')
	{
		Effect.SlideDown('dd'+index, { duration: 1.5 });
		document.getElementById('strz'+index).src = arrow_up.src;
		for(var i=0; i<li_tags.length; i++)
		{
			if(document.getElementById('dd'+i).style.display != 'none' && i != index)
			{
				Effect.SlideUp('dd'+i, { duration: 1.5 });
				document.getElementById('strz'+i).src = arrow_down.src;
			}
		}		
	}else{
		Effect.SlideUp('dd'+index, { duration: 1.5 });
		document.getElementById('strz'+index).src = arrow_down.src;
	}
	

	

}