Bit of Assistance ( adding variable to search )

[TimberFloorAu]

Lets say I have a fixed link of:

www.abc123.com/result/variable

This spews out results for the variable / search term a user enters.

The result is always as above.

So how do I:

create a search box, where user can type in word

that word is the variable

This word gets added to : www.abc123.com/result/word

And onclick/submit a window opens with the destination URL being:

www.abc123.com/result/word

Its been that long since I did stuff like this I am sure its a get/post thang...
Its so simple its driving me nuts.

Any help appreciated.

Ste