$ is not defined (SharePoint + JS)
<p>This error keep showing up, so hopefully you throw some light here, my code is the following:</p>

<pre><code>&lt;script type="text/javascript" src="//ajax.aspnetcdn.com/ajax/jQuery/jquery-1.7.2.min.js/"&gt;&lt;/script&gt;
&lt;script type="text/javascript" src="//ajax.aspnetcdn.com/ajax/4.0/1/MicrosoftAjax.js/"&gt;&lt;/script&gt;
&lt;script type="text/ecmascript" src="/_layouts/15/sp.runtime.js"&gt;&lt;/script&gt;
&lt;script type="text/ecmascript" src="/_layouts/15/sp.js"&gt;&lt;/script&gt;

&lt;script&gt;    
    function funcionX() {
        //$("#submit-button").click(function () {
            var context = SP.ClientContext.get_current();

            alert('Entro');

            var movies = context.get_web().get_lists().getByTitle("Movies");
            var movieCreationInfo = new SP.ListItemCreationInformation();
            var movie = movies.addItem(movieCreationInfo);
            movie.set_item("Title", $("#movie-title").val());
            movie.set_item("MovieDescription", $("#movie-description").val());
            movie.update();
            context.load(movie);

            context.executeQueryAsync(success, failure);


        function success() {
            $("#movies-output").text("Created movie!");
        };
        function failure() {
            $("#movies-output").text("Something failded");
        };
    };
&lt;/script&gt;

Title: &lt;input type="text" id="movie-title" /&gt; &lt;br /&gt;
Description: &lt;input type="text" id="movie-description" /&gt; &lt;br /&gt;
&lt;button type="button" id="submit-button" onclick="funcionX()"&gt;Add Movie&lt;/button&gt;

&lt;div id="movies-output"&gt;&lt;/div&gt;
</code></pre>

<p>I understand the error is because my browser is not recognizing jquery, right?</p>

<p>Thank you for your help and sorry for the bad english!</p>