showthis = function(obj) {
    new Fx.mzStyle(obj, 'opacity', { duration: 500, transition: Fx.Transitions.linear }).start(0, 1);
}

createtips = function(elements) {

    return new Tips(elements, {
        initialize: function() {
            this.fx = new Fx.Style(this.toolTip, 'opacity', { duration: 500, wait: false }).set(0);
        },
        onShow: function(toolTip) {
            this.fx.start(1);
        },
        onHide: function(toolTip) {
            this.fx.start(0);
        }
    });
}