Tipe pertama:
Salinan kode adalah sebagai berikut:
<type skrip = "Teks/JavaScript">
function check (form) {
if (form.userid.value == '') {
peringatan ("Harap masukkan akun pengguna!");
form.userid.focus ();
mengembalikan false;
}
if (form.password.value == '') {
peringatan ("Harap masukkan kata sandi login!");
form.password.focus ();
mengembalikan false;
}
Kembali Benar;
}
</script>
<Form Action = "Login.do?act=login" Method = "Post">
Akun pengguna
<input type = name teks = "userid" size = "18" value = "">
<br>
Kata sandi login
<input type = "password" name = "password" size = "19" value = ""/>
<input type = kirim nama = "kirim1" value = "login" onclick = "return check (this.form)">
</form>
Tipe kedua
Salinan kode adalah sebagai berikut:
<type skrip = "Teks/JavaScript">
function check (form) {
if (form.userid.value == '') {
peringatan ("Harap masukkan akun pengguna!");
form.userid.focus ();
mengembalikan false;
}
if (form.password.value == '') {
peringatan ("Harap masukkan kata sandi login!");
form.password.focus ();
mengembalikan false;
}
Kembali Benar;
}
</script>
<Form Action = "Login.do?act=login" Metode = "POST" ONSUBMIT = "Return Check (this)">
Akun pengguna
<input type = name teks = "userid" size = "18" value = "">
<br>
Kata sandi login
<input type = "password" name = "password" size = "19" value = ""/>
<Input Type = Kirim Nama = "Kirim1" Value = "Login">
</form>
Tipe ketiga:
Salinan kode adalah sebagai berikut:
<type skrip = "Teks/JavaScript">
function check (form) {
if (form.userid.value == '') {
peringatan ("Harap masukkan akun pengguna!");
form.userid.focus ();
mengembalikan false;
}
if (form.password.value == '') {
peringatan ("Harap masukkan kata sandi login!");
form.password.focus ();
mengembalikan false;
}
document.myform.submit ();
}
</script>
<Form Action = "Login.do?act=login" Name = "MyForm" Method = "Post">
Akun pengguna
<input type = name teks = "userid" size = "18" value = "">
<br>
Kata sandi login
<input type = "password" name = "password" size = "19" value = ""/>
<input type = tombol nama = "kirim1" value = "login" onclick = "periksa (this.form)">
</form>