$( document ).ready(
function ()
{
	
	$( '.popup_close' ).click(
	function()
	{
		
		$( this ).parent().fadeOut( 250 );
		
	}
	);
	
}
);

function open_book ( sent_book )
{
	
	var div_id = '#book_' + sent_book;
	
	$( div_id ).fadeIn( 500 );
	
}