function getParameterByName(name){
name=name.replace(/[\[]/,"\\[").replace(/[\]]/,"\\]");
var regex=new RegExp("[\\?&]"+name+"=([^]*)");
var results=regex.exec(location.search);
return results==null?"":decodeURIComponent(results[1].replace(/\+/g," "));
}
$preview=getParameterByName("preview");
if($preview==""){
}else if($preview=="control"){
document.cookie="lander-ab-tests-50308710=lander_control";
}else{
document.cookie="lander-ab-tests-50308710=lander_"+$preview;
}