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<!DOCTYPE html>
<html>
<head>
<title>Source Code JavaScript</title>
<script type="text/javascript">
window.onload=function()
{
/*
login: Nama form
username : nama elemen input
pass: nama elemen input
*/
var username=document.login.username;
var pass=document.login.pass;
username.onkeyup=function()
{
//hasil : nama form
//user  : id elemen
document.hasil.user.value=username.value;
}
pass.onkeyup=function()
{
//pass : id elemen
document.hasil.pass.value=pass.value;
}
}
</script>
</head>
<body>
<form name="login">
<input name="username" type="text">
<input name="pass" type="password">
</form>
<br>
<form name="hasil">
<input id="user" type="text">
<input id="pass" type="text">
</form>
</body>
</html>