Untitled

<html>
<head>
<script language="JavaScript">

var names = ["MACK","KAV"];
var user = prompt("Please enter your username.").toUpperCase();

switch(user) {
case names[0]:
var password = prompt("Please enter your password.").toUpperCase();
   if(user === 'MACK' && password === 'ATTACK') {
    document.write("Hi Mack! Welcome back!");
}
else{
            for(i =0; i >1000; i++) {
 document.write("Password not valid!!! ");
     };
};
    break;
    case names[1]:
var password = prompt("Please enter your password.").toUpperCase();
   if(user === 'KAV' && password === 'KAV') {
    document.write("Hello!");
}
else{
            for(i =0; i >1000; i++) {
 document.write("Password not valid!!! ");
     };
};
    break;
default:
   for(i =0; i >1000; i++) {
    document.write("Username not valid!!! ");
};
};

</script>
</head>
<body>
</body>
</html>