Pass variable from MC to _root

[frosty1_4me]

Hi,

I have a movieclip that is loaded from the main timeline. Within that mc I have a button that when clicked I want to pass a variable back to a function within the main timeline.

The below bold string is what I want to pass as a variable from the button click event in the mc to the function LoadGallery in the main timeline.

Defines the xml path to pass to the function

function loadGallery1(){
    loadGallery("Flash/gallery1.xml");   
}


Calls LoadGallery function and recieves the xml path:

function loadGallery(galName){
    _root.xmlDataPath = galName;  
    mcLoader.loadMovie("Flash/viewer.swf");
}


Calls function to run it:

loadGallery1();

All of the above code resides in the main timeline (_root), I don't show a button click event here from the mc because I don't have one. All I need that button click event to do is to populate that bold string above.

Can anyone help me with this?

thanks