function convert(str) {
  return String(str).replace(/\s/g,"%20");
}

function mail_text() {
 var host="apipack"+".com";
 var eml="qry"+"@"+host;
 var subject=document.forms["letter"].elements["subj"].value;
 subject=subject+" to "+convert(document.forms["letter"].elements["dep"].value);
 subject=subject+"/"+convert(" From: "+document.forms["letter"].elements["fromM"].value);
 subject=subject+convert(", Mr."+document.forms["letter"].elements["person"].value);
 //body = convert(document.forms["letter"].elements["msgt"].value);
 //window.open("mailto:"+eml+"?subject="+convert(subject)+"&body="+body);
 window.open("mailto:"+eml+"?subject="+convert(subject));
}