Aqui hice una solucion sencilla
Código Javascript
:
Ver original<script language="JavaScript">
var password;
var pass1="PASSWORD-HERE";
password=prompt('Whats The Magic Word?',' ');
while (password!=pass1) {
alert('That Is Incorrect!')
password=prompt('Whats The Magic Word?',' ');
}
alert('That Is Correct!')
</script>