function showHide(el) {
	var trElements = el.parentNode.parentNode.parentNode.getElementsByTagName('TR');
	for(var i = 0; i < trElements.length; i++) {
		if(trElements[i].className == 'hideTariff') {
			trElements[i].className = 'showTariff';
		}
	}
	el.parentNode.parentNode.parentNode.removeChild(el.parentNode.parentNode);
}