evs add button

<?php
// And for non-tinyMCE and general functions
function wp_evs_integrate_basic() {
    ?>
    <script type="text/javascript">
    function WPEVSPopup() {
     var evscode = prompt('Please enter your EasyVideoSuite code here. Audio files and lightboxes will work also!');
     if(typeof(evscode) == 'string' && evscode.length > 0) {
            var url = '<?php echo plugins_url('/wp-evs/images/placeholder.png?v=1'); ?>';

            evscode = evscode.replace('<!--', '').replace('//-->', '');

            evscode = base64_encode(evscode);

            var html = '<img class="wpevs-container" src="'+url+'" style="display: block; width: 400px; height: 200px;" alt="'+evscode+'" />';
            edInsertContent(edCanvas, html);
     }
    }

    jQuery(document).ready(function() {
        setTimeout(function() {
            jQuery('#ed_toolbar').append('<input type="button" class="ed_button" onclick="WPEVSPopup()" title="Click" value="Embed an evs video" />');
        }, 500);
    });
    </script>
    <?php
}
add_action('edit_form_advanced', 'wp_evs_integrate_basic');
add_action('edit_page_form', 'wp_evs_integrate_basic');
?>