Silmple Check Form Js

Cara cek kosong atau tidak dengan javascript :

//check inside insert column
function checkthisform(){
var x=document.forms["myloginfrm"]["username"].value;
var y=document.forms["myloginfrm"]["password"].value;
if(x == null || x == ""){
alert ("Username harus di isi");
return false;
}
if(y == null || y == ""){
alert ("Password harus di isi");
return false;
}
}

.
myloginfrm = nama form misal <form name="myloginfrm" onsubmit="checkthisform() ....
username & password = nama kolom input misal <input type="text" name="username/password" ....

Thats all we need to do.

referensi : w3school

Selamat belajar.