Odd JScript behaviour

[pjaquiery]

If I use

["/samplestring/".replace (/[[\\\/]]$/, "")]

as the Value: for a Set Macro step the macro is set to

/samplestring/

and is also shown in the mouseover tool tip with shift down. If I use the immediate pane in the Script Editor to evaluate:

"/samplestring/".replace (/[\\\/]$/, "")

I get:

/samplestring

What am I missing here?

Update: replace (/(\\|\/)$/, "") works around the problem