var num = 0;
var step = -655;

function my_timeout(){

	if (timer_is_on)
	{
		clearTimeout(t);
		timer_is_on = 0;
	}
	else 
	{
		t = window.setTimeout('my_func()', 10000);
		timer_is_on = 1;
		my_func();
	}
}

function my_func(param){
	if (param)
	{
		num = param-1;
	}
	else num++;
	if (num>4) num = 0;
	nextSlide(num);
}

function nextSlide(numLocal){
	num=numLocal;
	deltaX = num*step;
	$('div.layerHolder').animate({'left': + deltaX + '-655px'}, 1000, "easeInOutExpo");
	clearTimeout(t);
	t = window.setTimeout('my_func()', 5000);
}