Has anyone thought of a template language based on ECMAscript?

e.g.

include_once('xtemplate.class.php');

// Instantiate the class and pass it the template file name
$xtpl = new XTemplate('mytemplate.xtpl');

// Fake some database style results
$myarray = array(
   0 => array('name' => 'apple', 'colour' => 'green or red', 'an' => true),
   1 => array('name' => 'orange', 'colour' => 'orange', 'an' => true),
   2 => array('name' => 'pear', 'colour' => 'green'),
   3 => array('name' => 'banana', 'colour' => 'yellow')
);

foreach ($myarray as $row) {

   // Assign the variable
   $xtpl->assign('fruit', $row);

   // Check if we need to change our grammar
   if (isset($row['an']) && $row['an'] == true) {
      $this->parse('main.row.an');
   }

   // Parse and reset the row for the next iteration
   $xtpl->parse('main.row');
}

// Parse and output the template
$xtpl->parse('main');
$xtpl->out('main');

And the corresponding template (’mytemplate.xtpl’):

<-- BEGIN: main -->
Here is some fruit:<br />
<-- BEGIN: row -->
A<-- BEGIN: an -->n<-- END: an --> {fruit.name} is usually {fruit.colour}<br />
<-- END: row -->
<-- END: main -->

Should produce the following output:

Here is some fruit:
An apple is usually green or red
An orange is usually orange
A pear is usually green
A banana is usually yellow

(Not that maintaining the project makes me biased in the slightest!)

But offcourse whatever works for you :)