hey guys i wanted 1 npc to only change sub classes...i mean i want when 1 character talk to npc right in panel the list of subclasses.and dont press 1 button with "change subclass" and after the list of subclasses...understand?

I think you're going to have to dig around in the java. If you look at the HTM of a villagemaster (whom you can change sub classes at) they have a special bypass:

 

<a action="bypass -h npc_%objectId%_Link villagemaster/SubClass.htm">Sub Class.</a><br>

 

after checking the villagemaster/SubClass.htm file, you'll see the bypass for adding or changing subclasses:

 

<a action="bypass -h npc_%objectId%_Subclass 1">Add Sub-Class.</a><br>

 

What I'm assuming is that the subclasses that are shown to the player are determined based on the ID of the NPC you're asking.