TinyMCE and images path

I'd like to have absolute path for links remain and not converted to relative ones.
Do you know how and where configure it through TinyMCE editor?

I have found the solution, maybe this could be useful for someone else

on

/admin/includes/tinymce.php

you have approx line 36

          // Location of TinyMCE script
          script_url : '../<?php echo DIR_WS_EDITORS ?>/tiny_mce/tiny_mce.js',
	  relative_urls : false,

change it with

          // Location of TinyMCE script
          script_url : '../<?php echo DIR_WS_EDITORS ?>/tiny_mce/tiny_mce.js',
	  remove_script_host : false,
          relative_urls : false,

Simply add remove_script_host : false to keep the absolute URL