manex

Ok,thank you very much again. I will give it a try, 😀

Thank you for your guidance, it was realy useful. As you said, once a draft is saved the content is accesible from the popup. FYI, this is how I accomplished it:

1. To create the popup: Define this function for the action media_buttons to add the image as a button to media buttons.

   function oi_itzultzaile_botoia_gehitu()
   	{
   				$urla='"'.get_bloginfo("wpurl").'/wp-content/plugins/ohar-itzultzailea/itzulpen-orria.php"';
   				$izena='"'.__("Ohar Itzultzailea","ohar-itzultzailea").'"';
   
   				echo "<img src='".get_bloginfo("wpurl")."/wp-content/plugins/ohar-itzultzailea/irudiak/itzuli-botoia.png'
   					class='thickbox'
   					alt='Itzulpena abian jartzeko erabiltzen den botoia irudikatzen duen irudia'
   					onclick='leihoaIreki($urla,$izena)' style='cursor: pointer;'/>";
   
   	}
   
   	add_action('media_buttons', 'oi_itzultzaile_botoia_gehitu',20);

   Then, in the .js file with the functions define this function to open the popup:

   function leihoaIreki(urla,izena)
   {
   	window.open(urla,izena,"width=640,height=500");
   }

2. In order to get the content of the editor from the popup:
   var aux=window.opener.document.getElementById("content").innerHTML;

With the code above I solved the problem. There is one issue, though, the pop-up does not follow the standard appearance of WordPress(in the previous version with the anchor it followed the standard appearance). I’ve tried a few things but I could not accomplish it, do you know how to do it?

Anyway, once again, thank you very much! 😀