lineage server coding language
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hello guys i have problem like this: i have lineage server and here is files cointain htm files and into html button tag is code like javascript function but it is not javascript. i am web developer and i cant understand wich coding language is that. now i will show you this code and if anybody knows this programing language please tell me. Code is like this : 

    <button value="Donat" action="bypass -h npc_%objectId%_Chat 4" width=67 height=15 back="pw_pack.Bt_normal_over2" fore="pw_pack.Bt_normal_over2">

and i need know whats make function "bypass -h"