var dwDefaults = new Class({
    //implements  
    Implements: [Options],

    //options  
    options: {
        collection: $$('input[type=text]')
    },

    //initialization  
    initialize: function(options) {
        //set options  
        this.setOptions(options);
        this.defaults();
    },

    //a method that does whatever you want  
    defaults: function() {
        this.options.collection.each(function(el) {
            el.set('value', el.get('rel'));
            el.addClass('watermark-text');
            el.addEvent('focus', function() { if (el.get('value') == el.get('rel')) { el.set('value', ''); el.removeClass('watermark-text'); } });
            el.addEvent('blur', function() { if (el.get('value') == '') { el.set('value', el.get('rel')); el.addClass('watermark-text'); } });
        });
    }
});