Multiple Ending URL// Append text?

There are a few choices for my URL that i want to link to.

www.this.com/Thing1
www.this.com/Thing2
.
.
.
www.this.com/ThingX

I would like when the first button is pushed it sets a string to the end link:

Saved = "Thing1"

Then later on it is able to make the final URL "http://www.this.com/[Saved]"

Is there a way to do this? Is there an easier method? will i have to do something like have String1 = "www.this.com" and String2 = "/Thing1" then merge them together with some sort of append?

Thanks for any help with this...

Ahh nm i wasnt thinking

i am now using the code

Name = "Thing1.swf"
Base = "http://www.this.com/"
URL = Base + Name