Help Please! When I click the insert button for shortcode, browser want to change page :S spot the error :)

<?php

//Creat Shortcode Layouts and Variables
function bf_button_shortcode( $params, $content=null ) {
    extract(shortcode_atts(array(
        'bf_size'     => 'default',
        'bf_color'    => 'default',
        'bf_value'    => 'button',
        'bf_icon'     => 'home',
        'bf_position' => 'center',
        'bf_href'     => "#"
    ), $params ) );

    $result = '<div class="bfbuttons-btn-wrap ' . $bf_position .'">

                   <a class="btn btn-' . $bf_size . ' btn-' . $bf_color . '" href="' . $bf_link . '">' . $bf_value . '
                   <span class="glyphicon glyphicon-' . $bf_icon . '"></span></a>

               </div>';


    return $result;
}
add_shortcode( 'bf_button', 'bf_button_shortcode' );





//Add the button to the tinymce editor
function bf_button_shortcode_button($context){

    return $context.=__("
        <a href=\"#TB_inline?width=480&inlineId=bf_button_shortcode_generator_popup&width=640&height=513\"
           class=\"button thickbox\"
           id=\"bf_button_shortcode_button\"
           title=\"Add My Shortcode\">
           BF Buttons
           </a>");
}
add_action('media_buttons_context','bf_button_shortcode_button');




//Generate content for the popup window when the button is clicked
function bf_button_shortcode_generator(){
?>

<div id="bf_button_shortcode_generator_popup" style="display:none;">

    <div class="wrap">

        <h2>Options for Buttons</h2>

        <form role="form">
            <div class="form-group">

                <label for="bf_size" class="bf_button_from_label">Size</label>
                    <select class="form-control bf_button_from_select" id="bf_size" name="bf_size">
                        <option value="xs">Extra Small</option>
                        <option value="sm">Small</option>
                        <option value="md">Normal</option>
                        <option value="lg">Large</option>
                    </select>

                <label for="bf_color" class="bf_button_from_label">Color</label>
                <select class="form-control bf_button_from_select" id="bf_color" name="bf_color">
                    <option value="default">Default</option>
                    <option value="primary">Primary</option>
                    <option value="success">Success</option>
                    <option value="info">Info</option>
                    <option value="warning">Warning</option>
                    <option value="danger">Danger</option>
                </select>

                <label for="bf_value" class="bf_button_from_label">Value</label>
                <input type="text" class="form-control bf_button_from_input" id="bf_value" name="bf_value" placeholder="Value" />

                <label for="bf_icon" class="bf_button_from_label">Icon</label>
                <select class="form-control bf_button_from_select" id="bf_icon" name="bf_icon">
                    <option value="glyphicon-home">Home</option>
                    <option value="glyphicon-user">User</option>
                    <option value="glyphicon-cog">Cog</option>
                    <option value="glyphicon-hand-left">Hand Left</option>
                    <option value="glyphicon-arrow-down">Arrow Down</option>
                    <option value="glyphicon-trash">Trash</option>
                </select>

                <label for="bf_position" class="bf_button_from_label">Position</label>
                <select class="form-control bf_button_from_select" id="bf_position" name="bf_position">
                    <option value="bfbuttons-btn-wrap">Space Around</option>
                    <option value="btn-container-center">Row Center</option>
                    <option value="btn-container-left">Row Left</option>
                    <option value="btn-container-right">Row Right</option>
                    <option value="btn-container-stretch">Space Between</option>
                    <option value="btn-container-col-center">Column Center</option>
                    <option value="btn-container-col-right">Column Right</option>
                    <option value="btn-container-col-left">Column Left</option>
                </select>

                <label for="link" class="bf_button_from_label">Link</label>
                <input type="text" class="form-control bf_button_from_input" id="link" name="link" placeholder="#" />

            </div>
            <button class="button-primary" id="insert_bf_button_shortcode">Add Shortcode</button>
        </form>

    </div>

</div>
<?php
}
add_action('admin_footer','bf_button_shortcode_generator');



//javascript code needed to make shortcode appear in TinyMCE edtor
function bf_button_shortcode_add_shortcode(){?>
<script>
jQuery(document).ready(function ( $ ) {

    $('#insert_bf_button_shortcode').on('click',function(){

        var size = $('select[name=bf_size]').val();
        var type = $('select[name=bf_color]').val();
        var value = $('input[name=bf_value]').val();
        var type = $('select[name=bf_icon]').val();
        var type = $('select[name=bf_position]').val();
        var link = $('input[name=link]').val();

        var shortcode = '[my_shortcode attributes="'+user_content+'"/]';

      if( !tinyMCE.activeEditor || tinyMCE.activeEditor.isHidden()) {
        $('textarea#content').val(shortcode);
      } else {
        tinyMCE.execCommand('mceInsertContent', false, shortcode);
      }
      //close the thickbox after adding shortcode to editor
      self.parent.tb_remove();
    });

});
</script>
<?php
}
add_action('admin_footer','bf_button_shortcode_add_shortcode');





function bf_button_shortcode_styles(){

    wp_enqueue_style( 'bf_button_shortcode_style', plugins_url( 'bf_button_shortcodes/css/bf_button_shortcodes.css') );

}
add_action( 'wp_enqueue_scripts', 'bf_button_shortcode_styles' );

function bf_button_admin_styles(){

    wp_enqueue_style( 'bf_button_shortcode_style', plugins_url( 'bf_button_shortcodes/css/bf_button_admin.css') );

}
add_action( 'admin_head', 'bf_button_admin_styles' );


?>