function btnChanger(color, sliId) {
	var id = sliId + "-btn";
	var btnId = document.getElementById(id);
	var dir = "/luchta/img/";

	if(btnId.className == "open") {
		btnId.className = "close";
		btnId.src = dir + 'close-btn-' + color + '.gif';
	} else if(btnId.className == "close") {
		btnId.className = "open";
		btnId.src = dir + 'open-btn-' + color + '.gif';
	} else {
		btnId.className = "close";
		btnId.src = dir + 'close-btn-' + color + '.gif';
	}
	Effect.toggle(sliId,'slide');
}