var how_many_ads = 2;
var now = new Date()
var sec = now.getSeconds()
var ad = sec % how_many_ads;
ad +=1;
if (ad==1) {
	document.write('<a href="/en/data/products_services/historical/publications/tsx_eReview.html"><img src="/en/images/ereview-banner1.gif"></a>');
}
if (ad==2) {
	document.write('<a href="/en/data/products_services/historical/publications/tsx_eReview.html"><img src="/en/images/ereview-banner2.gif"></a>');
	}