function resizeGrid(gId) {
    var g = $(gId);
    var b = $$('div#' + gId + ' .button');

    if (g != null && b != null) {
        var gW = g.getWidth() * 1;
        var r = 5;

        if (gW <= 690)
            r = 3;
        else if (gW <= 750)
            r = 4;

        var bW = (gW / r) - 15;
        for (var i = 0; i < b.length; i++) {
            b[i].setStyle('width:' + bW + 'px');
        }
    }
}