function SetBHROICookie(cookieName,cookieValue,nDays) {
var today = new Date();
var expire = new Date();
if (nDays == null || nDays == 0) nDays = 30;
expire.setTime(today.getTime() + (3600000 * (24 * nDays)));
document.cookie = cookieName + "=" + escape(cookieValue) + ";expires=" + expire.toGMTString() + ";path=/;domain=" + location.host.substr(location.host.indexOf('.'));
}
var query = window.location.search;
var varStart = query.indexOf("roi")+4;
var varEnd = (query.indexOf("&", varStart) > 0) ? query.indexOf("&", varStart) : query.length;
var roi_data = query.substring(varStart, varEnd);
if (varStart > 4){
SetBHROICookie("bh_roi",roi_data,30);
}
// You'll need to set the total purchase amount and a unique order ID prior to this script.
// This information would typically be generated by your shopping cart
var amount = 9.99;
var orderId = "5X12345";
var valStart = document.cookie.indexOf("bh_roi");
var valEnd = (document.cookie.indexOf(";", document.cookie.indexOf("bh_roi")) > 0) ? document.cookie.indexOf(";", document.cookie.indexOf("bh_roi")) : document.cookie.length;
var bh_cookie = document.cookie.substring(valStart, valEnd);
if(bh_cookie.length > 0) {
var roi_data1 = bh_cookie.substring(bh_cookie.indexOf("=")+1, bh_cookie.length);
// display the tracking image
//document.write('
');
//alert('
');
}