Rhino javascript replace special characters

Have script running and trying to replace some special Characters, but dosent seem to work or I don't have the right codes...

//Remove Vertical Tabs  x0B
text = text.replace(/\v/g, "");     //I think this is working.

//Remove File Separators, don't think either of the following are working.  x1C
text = text.replace(/\f/g, "");
text = text.replace(/\x1C/g, "");