Q152 How do I protect documents so that they are only accessible after entering the correct user id and password?

<SCRIPT LANGUAGE="JavaScript"><!--
function go() {
    location.href = 'http://www.xxx.yyy/' + document.passwordForm.userid.value + '/' + document.passwordForm.password.value + '.htm';
    return false;
}
//--></SCRIPT>

<FORM NAME="passwordForm" onSubmit="return go()">
<P>Enter userid: <INPUT NAME="userid" TYPE="TEXT">
<P>Enter password: <INPUT NAME="password" TYPE="PASSWORD">
<INPUT TYPE="BUTTON" VALUE="Enter" onClick="go()">
</FORM>