How To Pass Param To JS File?

I need to pass a hard coded value to a JS file:

<script language="JavaScript" src="Tracking.js"
type="text/javascript"></script>

Neither of these methods work:

<script language="JavaScript" src="Tracking.js?someid=303"
type="text/javascript"></script>

or

<script language="JavaScript" src="Tracking.js"
type="text/javascript">var someid = 303;</script>

or

<script>var someid = 303;</script>
<script language="JavaScript" src="Tracking.js"
type="text/javascript"></script>

Any suggestions?