Response

There are a few things to keep in mind for a proper inclusion of script on the page:

/themes/nome-do-tema/functions.php

Given these attentions, your code based on the comment you left on @Victor Mendonça's answer would look like this:

/**
 * Função onde adicionamos à lista de inclusões
 * todos os scripts que pretendemos incluir.
 */
function my_scripts() {

  // script 01
  wp_enqueue_script(
    'widget_min',
    get_stylesheet_directory_uri() . '/js/jquery/jquery.widget.min.js',
    array('jquery')
  );

  // script 02
  wp_enqueue_script(
    'metro_min',
    get_stylesheet_directory_uri() . '/js/metro/metro.min.js',
    array('jquery')
  );

  // ...
}

// adicionamos uma acção que chama a nossa função
add_action( 'wp_enqueue_scripts', 'my_scripts' );

Note:
It should work assuming you have the script files where you are indicating they are and assuming you already have jQuery present.

You can also check the output of the paths in use to ensure they are pointing to the desired location / file:

// caminho recolhido
echo get_stylesheet_directory_uri();

// caminho recolhido + restante até ao teu ficheiro
echo get_stylesheet_directory_uri() . '/js/metro/metro.min.js';

The wp_enqueue_script function is responsible and recommended to include script :

Description

  

Links to a script file to the generated page at the right time according to the script dependencies, if the script has not already been included and if all the dependencies have been registered. You could either link to script with a handle previously registered using the wp_register_script () function, or provide this function with all necessary parameters to link to script.

     

This is the recommended method of linking JavaScript to a WordPress generated page.

What translated:

  

Binds a script file to the generated page at the right time depending on its dependencies, if the script has not been included, and all the dependencies have been registered. You could include a script with a previously registered identifier using the wp_register_script function (), or provide this function with all the parameters needed to include a script.

     

This is the recommended method to include JavaScript in a page generated by WordPress.

Parameters

It accepts a series of parameters to better control how script should be included:

 <?php wp_enqueue_script( $handle, $src, $deps, $ver, $in_footer ); ?> 

Parameters:

• $handle

  Name used as an identifier of script .

• $src

  Path to the file that contains script .

• $deps

  Matrix with indication of the dependencies that this script has, an example will be:

  array('jquery') // indica que o script precisa de ter o jquery carregado para funcionar
  

• $ver

  Optional field to indicate the version of script .

• $in_footer

  Optional field to indicate if the script instead of being within HEAD , should be immediately before closing BODY .

Example Usage

A simple example of using this function:

/**
 * Função onde adicionamos à lista todos os scripts
 * que pretendemos incluir.
 */
function my_scripts() {

  wp_enqueue_script(
    'nome-do-script',
    get_template_directory_uri() . '/js/meu_ficheiro.js',
    array('jquery'),
    '1.0.0',
    true 
  );
}

// adicionamos uma acção que chama a nossa função
add_action( 'wp_enqueue_scripts', 'my_scripts' );

Response Credits

- Answer given by @b__ in SOEN
- < a href="https://wordpress.stackexchange.com/a/45440/16692"> Answer given by @Chip Bennett in WordPress - WordPress Documentation for add_action
- WordPress Documentation for get_stylesheet_directory_uri
- WordPress Documentation for wp_enqueue_script
- Do not Dequeue WordPress' jQuery by Eric Mann

Well, I'm not sure if I understand your question right, but if I understand, this will solve you.

Use wp_register_script :

wp_register_script('jquery', 'http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js', false, '1.3.2');

Or create any method with the body like this in the functions.php file (in the template root):

function loadJS(){
    echo '<script type="text/javascript" src="'.bloginfo('stylesheet_directory').'/js/jquery.form.js"></script>';
}

and call him after his statement

loadJS();

Zuul, it worked here I used the code

function my_scripts() {

  wp_enqueue_script(
    'nome-do-script',
    get_template_directory_uri() . '/js/meu_ficheiro.js',
    array('jquery'),
    '1.0.0',
    true 
  );
}

// adicionamos uma acção que chama a nossa função
add_action( 'wp_enqueue_scripts', 'my_scripts' );

and my code inside the functions.php file in javascript was conflicting with other javascript code using jquery worked normally on wordpress. Thank you.