Dynamic Text Box Variables

Hi,

At the moment im using the variable option of a dynamic text box to load text. The variable is loaded into the swf via an external htm file that has multiple variables in it (i dunno if that makes sense but you know how you can load in a set of variables from an html like eg. down below):

Anyway, now i want to have 10 different movie clips that act as buttons, so that when they are clicked, they change the variable of the dynamic text box soo it loads a different section of text from the html file. I have tried the .variable property of the text box but still no luck. I looked at another thread else where but i dont understand exactly how they are changing it there. I'll copy in the link anyway just incase it helps or someone can explain what they are doing. Can anyone help me with this??

Thanks in advance for your help

Cheers
Damien