Is There a Script For This?

What I need to do is to disable the browser-side text resizing thing... you know, in the browser a person can go to View - Text Size, and then make the text really big or really small or really ordinary and otherwise mess up the look of the entire page I put together. Is there a script I can use to disable this ability completelyt, so that when I say "Text Size is Gonna Be Medium" it stays that way regardless of how much the viewer may enjoy setting text size to be Huge?