WordPress theme Raindrops wp_nav_menu() show allways fixed page top.

functions.php

<?php
/**
 * Menu fixed
 *
 *
 *
 */
	define('NOBITA_QUERY', 'nobita_fixed_menu' );

	define('NOBITA_VALUE_TYPE', 'js');  //または、css

	$nobita_external_link_value =<<<SCRIPT

jQuery(function() {

	jQuery(window).scroll(function () {

		if (jQuery(this).scrollTop() > 100) {
		
			jQuery('#access').css({'position':'fixed','top':'0','z-index':'999','margin':'0'});
			jQuery('.logged-in #access').css({'position':'fixed','top':'29px','z-index':'999','margin':'0'});
		} else {
			jQuery('#access').css({'position':'static'});
			jQuery('.logged-in #access').css({'position':'static'});
		}

	});

});

SCRIPT;

	add_action( 'after_setup_theme', 'nobita_setup_theme' );

	function nobita_setup_theme(){

		add_filter('query_vars','nobita_extend_query');
		add_action( 'wp_enqueue_scripts', 'nobita_add_style_link', 99 );
		add_action( 'template_redirect', 'nobita_external_link_value' );

	}	

	function nobita_extend_query( $vars ) {

		$vars[] = NOBITA_QUERY;
		return $vars;
	}

	function nobita_add_style_link() {
		if( NOBITA_VALUE_TYPE == 'css' ){
			wp_register_style( 'nobita-extend-style', sprintf('/?%1$s=1', NOBITA_QUERY ) );
			wp_enqueue_style( 'nobita-extend-style' );
		} elseif ( NOBITA_VALUE_TYPE == 'js' ) {
			wp_register_script( 'nobita-extend-script', sprintf('/?%1$s=1', NOBITA_QUERY ) );
			wp_enqueue_script( 'nobita-extend-script' );
		}
	}

	function nobita_external_link_value(  ) {

		global $nobita_external_link_value;

		if( intval( get_query_var( NOBITA_QUERY ) ) == 1 ) {		

			$mime_type = wp_get_mime_types( NOBITA_VALUE_TYPE );

			if ( ! headers_sent( ) ) {

				header( 'Content-type: '.$mime_type );
			}
			
		// add value check

		if( NOBITA_VALUE_TYPE == 'css' ){ 

			$nobita_external_link_value = strip_tags( $nobita_external_link_value );
		} elseif ( NOBITA_VALUE_TYPE == 'js' ) {
		
			$nobita_external_link_value = strip_tags( $nobita_external_link_value );
		}
			echo $nobita_external_link_value;

			exit;
		}
	}
?>