[jQuery] Equal Columns After DOM

[chaking]

I'm trying to use jquery to keep my columns equal in height.  The
problem is that when I expand something in my menu in one of those
columns, the height doesn't re-adjust. I'm thinking it's because it's
only called when document.ready...

I don't know the event very well, but is there a way I could call this
so when the height adjusts?

code:
function equalHeight(group) {
        tallest = 0;
        group.each(function() {
                thisHeight = $(this).height();
                if(thisHeight > tallest) {
                        tallest = thisHeight;
                }
        });
        group.height(tallest);
}
$(document).ready(function() {
        equalHeight($(".column"));
});