Sorry for so late answer, but first i wishes something where can undefined quantity of panel use! - That first.
second is here:
//////////////////////////////////////////////
mantu_pan = pan_create("bmap =abols.tga;",14,);
mantu_pan.on_click = parvietot_mani;
//////////////////////////////////////////////
OR "on_click" can get in that quotation marks! Then sure every panel will execute his own pressed function, but then for panels need termine like "Me". Overnamed entity name let use mostly functions for last entity! And that next_entity i dont understand too - haw can use it.

And then here is much questions - if any really this engine user can help me - please, because panel system looks quit primitive here!