var saIndex = 1;
function changeSonderangebot () {
	var baseName = "sap";
	var i = 0;
	var id = baseName + String(i)

    while (document.getElementById(id)) {
		if (i == saIndex) {
			document.getElementById(id).style.display = "block";
		} else {
			document.getElementById(id).style.display = "none";
		}
		i = i + 1;
		id = baseName + String(i)
	}
	saIndex = saIndex + 1
	if (saIndex == i) saIndex = 0;
	window.setTimeout("changeSonderangebot()", 5000);
}

window.setTimeout("changeSonderangebot()", 5000);