Javascript popup (MM_openBrWindow)

Hi

Come across “MM_openBrWindow” in coding to open popups, but can’t get it to open a window with a specified name.

onclick=“MM_openBrWindow(‘recfem.htm’,’’,‘width=200,height=525’)” />

Can I just use the basic:
window.open(URL,name,specs,replace)in stead or is MM_openBr special in some way?thanks