inserting script into an svg

What I really want to do is have a javascript function written in an HTML file that embeds the SVG. I want the SVG, upon zooming in the Adobe Viewer, to call the javascript function in the HTML file.
I'd like to do that so that I won't have to put duplicate code in every SVG file.
Whats the best way to do that?

You can put your function in html and to get svg root use
document.YourEmbedName.getSVGDocument().firstChild

In svg use onzoom = "parent.YourFunction()"

Michel