window.addEvent('domready', function() {  
$$('img._f2').each(function(img) {  
    var src = img.getProperty('src');  
    var extension = src.substring(src.lastIndexOf('.'),src.length)  
    img.addEvent('mouseenter', function() { img.setProperty('src',src.replace(extension,'_f2' + extension)); });  
    img.addEvent('mouseleave', function() { img.setProperty('src',src); });  
});  
var mySlide = new Fx.Slide('expand').hide();

$('toggle').addEvent('click', function(e){
	e = new Event(e);
	mySlide.toggle();
	e.stop();
});

$('slideout').addEvent('click', function(e){
	e = new Event(e);
	mySlide.slideOut();
	e.stop();
});
});