Prevent duplicate form submissions in Phonesites.com

prevent-dupes.html

<script>
// Add to Custom Code > Bottom of Body
  try{
    if(localStorage.getItem("lead_id")){
      setError("Only one submission allowed.");
      throw new Error();
    };
  } catch(e){
    console.error(e);
  };
  window.beforePost= function(){
    try{
      if(localStorage.getItem("lead_id") || store.submitCount > 1){
        store.preventPost= true;
        window.location.reload();
       };
    }catch(e){
      console.error(e);
    };
   };
</script>