(WB 12 Eng) How to change Page MouseCursor?

HI,

I'm trying to change the mouse cursor to curwait for all the page with no result:
I have tried:
1. In server code:
PAGE_Test..Mousecursor = curwait
Does't work, neither IE nor Firefox.
2. Browser code. Row Selection of Table:
PAGE_Test..Mousecursor = curwait
Browser sends a error: document.style is undefined
The JS generated code :
function _T1(event){{document.style.cursor="wait"}}

Any idea?

Regards