var adController;
adController = new AdController();


function AdController(options) {
	var defaultOptions = {opt1Id : 'hotlink', opt2Id : 'adsense'};
	var opt1Id;
	var opt2Id;
	
	if(options) {
		opt1Id = options.opt1Id;
		opt2Id = options.opt2Id;	
	}
	else {
		opt1Id = defaultOptions.opt1Id;
		opt2Id = defaultOptions.opt2Id;
	}
	
	this.showAd = function showAd() {
		
		var now = new Date();
		var stamp = now.getTime();
		if(stamp) {
			var target = (stamp %2 == 0) ? opt1Id : opt2Id;
			var obj = document.getElementById(target);
			if(obj) {
				obj.style.display = "block";
			}
		}
	}	
	
}