jQuery equal heights function

I couldn't find anything that was short and consice on the interwebs, so here's my equal heights function:

jQuery.fn.equalHeight = function() {
    var tallest = 0;

    // find tallest element
    this.each(function() {
        ch = $(this).height();
        if(ch > tallest)
        {
            tallest = ch;
        }
    });

    $(this).height(tallest);
};