function captureImpression(sPromoID, sSiteID) {
    var url = "/PromoClick.asp?PromoID=" + sPromoID + "&SiteID=" + sSiteID + "&Action=impression";
    if(document.domain == "www.uswater.info" || document.domain == "www.lakesonline.com") url = "/Sites" + url;
    $.get(url);
}