loading scripts in plugin

hi i am using this code in my plugin but it’s not working my plugin
add_action(‘init’,’sample_load_scripts’);
function sample_load_scripts()
{
wp_enqueue_script(‘jquery’);
wp_enqueue_script(‘jquery-ui-core’);
wp_enqueue_script(‘jquery-ui-datepicker’);

wp_enqueue_style(‘jquery-ui-css’, ‘https://ajax.googleapis.com/ajax/libs/jqueryui/1.8.2/themes/smoothness/jquery-ui.css’);
}
?>
<script>
jQuery(document).ready(function() {
jQuery(‘#date’).datepicker({
dateFormat : ‘dd-mm-yy’
});
});
</script>
<input id=”date” name=”date” />
<?php