You have to get PHP to write the Javascript source code.
Someeone remind me what a Javascript array looks like---? Thanks:
$mydata=array();
foreach($data['blah'] as $element)
{ $mydata[]="'$element'";
}
$mydata = implode(",",$mydata);
echo "var JSArray=new array($mydata);";
Something like that - depending on what your data looks like.