function katalog_do_por(item)
{
	var czas = new Date();
	var tmp = new Image();
	tmp.src = 'js/katalog_porownaj.php/'+czas.getTime()+'.gif?id='+item.value+'&op='+(item.checked?'1':'0');
	tmp = null;
}

function katalog_por_czysc()
{
	var czas = new Date();
	var tmp = new Image();
	tmp.src = 'js/katalog_porownaj.php/'+czas.getTime()+'.gif?id=0&op=2';
	tmp = null;
	
	if (document.clcmprfrm.elements)
	{
		for (var i = 0; i < document.clcmprfrm.elements.length; i++)
		{
			if (document.clcmprfrm.elements[i].type == 'checkbox') document.clcmprfrm.elements[i].checked = false;
		}
	}
}