For example,

I only want this code to show up on Wed:

<center>
<font color="red">Rep lay Of Tuesday's Call:</font>
<script type='text/javascript' src='swfobject. js'></script>
<div id='mediaspace' >This text will be replaced</div>
<script type='text/javascript'>
var so = new SWFObject('play er.swf','mpl',' 504','24','9');
...