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.addEvent('focus', function() { if(el.get('value') == el.get('rel')) { el.set('value',''); } });
            el.addEvent('blur', function() { if(el.get('value') == '') { el.set('value',el.get('rel')); } });
        });
    }
    
});