How to use $vbphrase in javascript ?

[bonmat86]

<script type="text/javascript">
var lfsr_username_available = '$vbphrase[lfsr_username_available]';
var lfsr_username_not_available = '$vbphrase[lfsr_username_not_available]';
var lfsr_username_invalid_censored = '$vbphrase[lfsr_username_invalid_censored]';
var lfsr_username_invalid_semicolon = '$vbphrase[lfsr_username_invalid_semicolon]';
var lfsr_username_too_short = '$vbphrase[lfsr_username_too_short]';
var lfsr_username_choose = '$vbphrase[lfsr_username_choose]';
var lfsr_match_fill_both = '$vbphrase[lfsr_match_fill_both]';
var lfsr_match_false = '$vbphrase[lfsr_match_false]';
var lfsr_match_true = '$vbphrase[lfsr_match_true]';
var lfsr_username_member_false = '$vbphrase[lfsr_username_member_false]';
var lfsr_username_member_true = '$vbphrase[lfsr_username_member_true]';
var lfsr_email_invalid = '$vbphrase[lfsr_email_invalid]';
var lfsr_email_banned = '$vbphrase[lfsr_email_banned]';
var lfsr_email_exists = '$vbphrase[lfsr_email_exists]';
var lfsr_email_valid = '$vbphrase[lfsr_email_valid]';
var lfsr_email_reject = '$vbphrase[lfsr_email_reject]';
var lfsr_email_no_responce = '$vbphrase[lfsr_email_no_responce]';
var lfsr_email_no_connect = '$vbphrase[lfsr_email_no_connect]';
var lfsr_email_validation_progress = '$email_progress_phrase';
var lfsr_email_submit_valid = '$vbphrase[lfsr_email_submit_valid]';
var lfsr_email_default = '$email_default_phrase';
</script>
<script language="JavaScript" type="text/javascript" src="clientscript/live_feedback_system.js"></script>

i know it,
i just wanna put $vbphrase in js file
like this

function validatemessage(messagetext, subjecttext, minchars)
{
	if (is_kon || is_saf || is_webtv)
	{
		// ignore less-than-capable browsers
		return true;
	}
	else if (subjecttext.length < 1)
	{
		// subject not specified
		alert(vbphrase['must_enter_subject']);
		return false;
	}
	else
	{
		var stripped = PHP.trim(stripcode(messagetext, false, ignorequotechars));

		if (stripped.length < minchars)
		{
			// minimum message length not met
			alert(construct_phrase(vbphrase['message_too_short'], minchars));
			return false;
		}
		else
		{
			// everything seems ok
			return true;
		}
	}
}

is there any ideal ?