function gotoCompany() { 
  loc = location.href;
  if (loc.indexOf("home.php") != -1 || loc.indexOf("pz.php") != -1 || loc.indexOf("user.php") != -1 || loc.indexOf("release.php") != -1) {
    loc = "company.php";
  }
  indx = loc.indexOf("?");
  if (indx != -1) {
    loc = loc.substring(0, indx);
  }
  loc = loc + "?company=" + document.company_select_box.company.value;
  location.href=loc;
}