cakePHP scriptStart() and scriptEnd(), how to use?

why this code is not working? Seemsm like i don't understand the usage of scriptstart() and scriptEnd().

// view
<?php
  $this->Html->scriptStart(array("block"=>true,"inline"=>FALSE));
?>
$().ready(function(){
    alert("dd");
});
<?php 
  $this->Html->scriptEnd();
?>
// layout
echo $this->fetch('script');

edit

Some more info:

1. I expect it to popup the alert..
2. In the example nothing happens. seems like the javascript is not being added to the page. (i checked the source)

Try removing the "block"=>true option, or setting it to 'script' instead:

// view
<?php
  $this->Html->scriptStart(array("block"=>'script',"inline"=>FALSE));
?>
    $().ready(function(){
        alert("dd");
    });
<?php 
  $this->Html->scriptEnd();
?>

Make sure you include the php tags in the layout:

// layout
<?php echo $this->fetch('script');?>