Could some help me with a javascript search and replace function....

var mylink = "mens-shirts.new-arrivals";

I just need to able to replace what comes after the "." with something else. eg. I want to end up with mylink being "mens-shirts.price-high-low" or "mens-shirts.-a-z and so on.

So just a generic function where I can input the new value each time.

Thanks very much