jQuery doesn't work

Hi,

I’ve a problem with jQuery function.
I want to add smooth scrolling when clicking an anchor link to my website..
I’ve put the following code to my php template file, but when i click to the link nothing happens

<script>

	function goToByScroll(id){
          // Reove "link" from the ID
        id = id.replace("link", "");
          // Scroll
        $('html,body').animate({
            scrollTop: $("#"+id).offset().top},
            'slow');
    }

    jQuery("#animated > a").click(function(e) { 
          // Prevent a page reload when a link is pressed
        e.preventDefault(); 
          // Call the scroll function
        goToByScroll($(this).attr("id"));           
    });

</script>

Can you help me?

Thanks

Regards,
Salvatore