function sendForm(){
  document.getElementById('jumpBox').target = "_blank";
  document.getElementById('jumpBox').submit();
  }

function jumpboxNicer(){
   document.getElementById("jumpBoxSubmit").style.position="absolute";
   document.getElementById("jumpBoxSubmit").style.left="-9999px";
   document.getElementById("jumpBoxSubmit").style.top="-9999px";
   document.getElementById('jumpBoxSelect').onchange = sendForm;
   }