var active = 0;
var strefa = Array('dzieciece', 'elastil', 'lycra', 'mikrofibra', 'strech');

function strefaNxt() {
	if (active < strefa.length - 1) {
		active++;
	} else {
		active = 0;	
	}
	
	strefaUpdate();
}

function strefaPre() {
	if (active > 0) {
		active--;
	} else {
		active = strefa.length - 1;	
	}
	
	strefaUpdate();
}

function strefaUpdate() {
	var name = document.getElementById('strefaCurrent');
	var temp = name.getElementsByTagName('img');
	for (var i = 0, j = temp.length; i < j; i++) {
		if (temp[i].src.indexOf(strefa[active]) > 0) {
			temp[i].style.display = 'inline';
		} else {
			temp[i].style.display = 'none';
		}
	}

	var tble = document.getElementById('strefaContent');
	var temp = tble.getElementsByTagName('img');
	for (var i = 0, j = temp.length; i < j; i++) {
		if (temp[i].src.indexOf(strefa[active]) > 0) {
			temp[i].style.display = 'inline';
		} else {
			temp[i].style.display = 'none';
		}
	}

}