Callback with php and javascript

Hi! How can add callback multi function with php and javascript? Example:

<script type="text/javascript">
$(document).ready(function(){
	var stream = {
		title: "<?php the_title(); ?>",
mp3: "<?php
     $my_meta = get_post_custom_values( 'mp3', $ID );
     if ( $my_meta) {
         foreach ( $my_meta as $val_key => $val_val ) echo $val_val;
     }
?>",
ready = false;
	$("#player_<?php the_ID(); ?>").Player({
Player: "#player_<?php the_ID(); ?>",
		ready: function (event) {
			ready = true;
		},
	});
});
</script>

http://wordpress.org/plugins/infinite-scroll/