Function Returns the action parameter from HTML /Javascript
Example ABAP 
myactionparameter =
s10actionparameter( ).
Format ABAP 
data:
  myactionparameter type string.

myactionparameter =
  s10actionparameter( ).
Parameters
Name Type Description
actionparameter string
External value sent via S10Apply()
Description In an HTML page you can call a method of the active ABAP object with S10Apply() and pass a string as second parameter. This string can be retrieved with s10actionparameter().
HTML 
<button type="button" class="toolbarbutton"
    onclick="S10Apply('startlist', 'orders');">
      Orders
</button>
ABAP 
method startlist.
   s10infomessage( |Action parameter: | &&  s10actionparameter( ) ).
endmethod.  
Components S10 Framework