Send a param with catchEvent?

[MrOmega]

is it possible to send a param with catchEvent?

such as I have these in a GuiShowImgCtrl of a character

PHP Code:

thiso.catchEvent( name, "onMouseDown", "RotateChar");  
thiso.catchEvent( name, "onRightMouseDown", "RotateChar"); 


in the function 'rotateChar' I can't determine which button was clicked as leftmousedown returns false.

I know I could make two short functions but I was wondering if I could combine them. Both attempts when I try to send a param fails to get the event, my question is moreso how to determine which mouse button was pressed?