var current = 0;
function changeOffer() {
	var count = document.getElementById("offers_count").value;
	if(count)
	{	
		for (i = 0; i < count; i++) {
			div = document.getElementById("offer_div_" + i.toString());
			if (i == current) {
				div.style.display = "block";
			}	else {
				div.style.display = "none";
			}
		}
		current = (current + 1) % count;
		setTimeout("changeOffer()", 6 * 1000);
	}
}