document.location.href += "&" + document.referrer
.split("?")[1]
.split("#")[0]
.split("&")
.filter(str => str.indexOf("utm_") > -1)
.join("&");
document.location.href += document.referrer.indexOf("?") > -1 ?
"&" + document.referrer
.split("?")[1]
.split("#")[0]
.split("&")
.filter(str => str.indexOf("utm_") > -1)
.join("&") : "";