It was a cache problem before, but I had to also adjsut the css in that script to:
<style type="text/css">
@media (min-width: 601px){
div.em-booking-login { display: none; }
div.em-booking div.em-booking-login { display: block; }
}
@media (max-width: 600px){
div.em-booking-form-details { float: none; width:auto; }
div.em-booking-form-details p label { float:none; width:auto; display:block; }
div.em-booking-form-details input[type="text"], div.em-booking-form-details select, div.em-booking-form-details textarea { width:99%; padding:1%; }
div.em-booking-login { float:none; margin:0px !important; border:0px !important; }
div.em-booking div.em-booking-login { display:none; }
}
</style>