[javascript] Matching a Forward Slash with a regex

I don't have much experience with JavaScript but i'm trying to create a tag system which, instead of using @ or #, would use /.

var start = /#/ig; // @ Match

var word = /#(\w+)/ig; //@abc Match

How could I use a / instead of the #. I've tried doing var slash = '/' and adding + slash +, but that failed.