How to add PHP inside a script?

Hi, can anyone tell me how to add the php that I've added to the line starting var ch_queries so that the script still works (at the moment it breaks).

Thanks for any help.

<script type="text/javascript"><!--
ch_font_title = "Verdana";
ch_font_text = "Verdana";
var ch_queries = new Array( "<?php if (content_format('field_ad_text', $field_ad_text[0]) != '') : ?>
  <?php foreach ($field_ad_text as $ad_text) { ?>
    <?php print content_format('field_ad_text', $ad_text) ?>
  <?php } ?>
<?php endif; ?>" );
var ch_selected=Math.floor((Math.random()*ch_queries.length));
if ( ch_selected < ch_queries.length ) {
ch_query = ch_queries[ch_selected];
}
//--></script>
<script  src="http://scripts.chitika.net/eminimalls/amm.js" type="text/javascript">
</script>

Code (markup):

 

<script type="text/javascript"><!--
ch_font_title = "Verdana";
ch_font_text = "Verdana";

var ch_queries = [];
<?php if (content_format('field_ad_text', $field_ad_text[0]) != '') : ?>
  <?php foreach ($field_ad_text as $ad_text) : ?>
    ch_queries.push(<?php echo content_format('field_ad_text', $ad_text) ?>);
  <?php endforeach; ?>
<?php endif; ?>

var ch_selected=Math.floor((Math.random()*ch_queries.length));
if ( ch_selected < ch_queries.length ) {
ch_query = ch_queries[ch_selected];
}
//--></script>
<script  src="http://scripts.chitika.net/eminimalls/amm.js" type="text/javascript">
</script>

PHP:

Try this one.