if (document.getElementById("j_username") != null) {
    document.getElementById("j_username").focus();
}
if (document.getElementById("orig_zip") != null) {
    document.getElementById("orig_zip").focus();
}
if (document.getElementById("tracking") != null) {
    document.getElementById("tracking").focus();
}
if (document.getElementById("abFrom.company_name") != null) {
    document.getElementById("abFrom.company_name").focus();
}