window.addEvent('domready', function(){
	$('drop_down_menu').getElements('li.menu').each( function( elem ){
		var list = elem.getElement('div.submenubox');
		var myFx = new Fx.Slide(list,{duration: 500}).hide();
		list.get('tween', {property: 'opacity', duration: 0}).start(0);
		elem.addEvents({
			'mouseenter' : function(){
				list.get('tween', {property: 'opacity', duration: 750}).start(1);	
				list.setStyle('display', 'inline');
				myFx.cancel();								
				myFx.slideIn();
				
			},
			'mouseleave' : function(){
				myFx.cancel();				
				myFx.slideOut();
				list.get('tween', {property: 'opacity', duration: 250}).start(0);
				
			}
		});
	})
});
//Windowopen
function oeffnefenster(url) {
  oeffnefenster = window.open(url, "SolarArt", "width=400,height=650,scrollbars=yes");
  oeffnefenster.focus();
}