Onclick highlight text within Iframe

[Code One]

I dont know if this will work but if so it would be cool:
I have a iframe that is the destination of all my browsed/opened files, and I use it for text files, I would like to be able to click the inside of the Iframe, so that the text within will automatically highlight, for easy copy/paste functions. I know I can right click and do it that way but Im lazy and so are my viewers, so if you know how could you please show me the source code? Anyone, any help.
Code One

[Jona]

It's probably possible. But if you're asking for code, hehe, I'm out of it. I doubt I'll ever really need that; and if I did I'd use a server-side language myself.