window.onload = function(){
txtSize = new Fx.Style('main_content', 'font-size', {duration: 200, unit: 'px'});  
var Tips1 = new Tips($$('.Tips1'));
//var mySlide = new Fx.Slide('login_feld', {duration:600}).hide();
if ($('login_button') != null) {
	$('login_button').addEvent('click', function(e){
		e = new Event(e);
		mySlide.toggle();
		e.stop();
	});
}
}