Can't Get Jquery to work

Someone please help me get my jquery to work. I have been trying to test it with a simple jquery file to make the display of my wrapper div set to none but it’s not working. Here is the code I have in the functions file.

<?php
	// Load jQuery
	wp_enqueue_script( 'jquery');    }
?>

Here’s what I have in my js file to change the display of the wrapper.

JQuery(document).ready(function($){
	$("#wrapper").css('display','none');							  	    });

Amd this is how I’m linking to the js file which is called lightbox.

<script src="<?php bloginfo('template_url');?>/Scripts/lightbox.js"></script>