https://themes.trac.wordpress.org/ticket/17393

functions.php

function persia_functions_js(){

	wp_enqueue_style('font-awesome', get_template_directory_uri().'/fonts/font-awesome/css/font-awesome.css');
	wp_enqueue_style('persia-style', get_stylesheet_uri(), array(), '20140322' );
	if ( is_rtl() ) {
		wp_enqueue_style( 'ResponsiveMultiLevelMenucss', get_template_directory_uri() .'/js/ResponsiveMultiLevelMenu/css/component-rtl.css');
	   } else {
		wp_enqueue_style( 'ResponsiveMultiLevelMenucss', get_template_directory_uri() .'/js/ResponsiveMultiLevelMenu/css/component.css');
	}

	wp_enqueue_style( 'persia-ie', get_template_directory_uri() . '/css/ie.css', array( 'persia-style' ), '20140322' );
	wp_style_add_data( 'persia-ie', 'conditional', 'lt IE 9' );
	
	wp_enqueue_script('persia-modernizr',get_template_directory_uri().'/js/ResponsiveMultiLevelMenu/js/modernizr.custom.js',array());
	
	if ( is_single() && comments_open() && ( 1 == get_option('thread_comments') )) {
		wp_enqueue_script( 'comment-reply' );
	}

	wp_enqueue_script('jquery-fitvids',get_template_directory_uri().'/js/FitVids/jquery.fitvids.min.js',array('jquery'),null,true);
	wp_enqueue_script('ResponsiveMultiLevelMenu',get_template_directory_uri().'/js/ResponsiveMultiLevelMenu/js/jquery.dlmenu.min.js',array('jquery'),null,true);
	wp_enqueue_script('persia-functions',get_template_directory_uri().'/js/functions.min.js',array('jquery'),null,true);
}

add_action('wp_enqueue_scripts','persia_functions_js');