var alternateContentOdds = 0;
var alternateContentTC   = "";
var href = document.location.href;

if (href.indexOf("tc=") == -1 && alternateContentOdds != 0) {
	var alternateContentRoll = new Date().getTime() * alternateContentOdds;
	if( alternateContentRoll == Math.floor(alternateContentRoll) ) {
		document.cookie = "alternateContent=true; path=/;";
		href += href.indexOf("?") == -1 ? "?" : "&";
		href += "tc=";
		href += alternateContentTC;
		document.location = href;
	}
}