Adding jQuery plugin to Drupal Good day

I only have access to my Drupal site's admin panel, not the ftp server. 
Now how can I upload a jQuery plugin, for example an image slider (with the js and css files) onto the site using the admin panel?
Note that the plugin is not part of the theme.

As I understand you need to add it on your theme's .info file:

scripts[] = js/my_jquery_plugin.js


BUT, is that file only accessible via ftp? 

How can I do this using the admin panel?

Thank You
I don't think you can do it that way. You can always do it quick and dirty, depending on how it's written.

If it's your own code, wrap it in the following and throw it in a block:

(function ($) {
    // in this function, you can use the $ which refers to the jQuery object
}(jQuery));


Or you can try creating a generic file content type with a file attachment, upload the .js into the public directory, then make a new block with a PHP filter and use drupal_add_js() and load in that file.