function showThemen(){
	var layerappear = new Fx.Tween('lb_Overlay', {
		property: 'opacity',
		onComplete: function(e) {
			center.start('0','1');
		}
		}
	);
	var center = new Fx.Tween('lb_Center', {
		property: 'opacity',
		duration: 1000
		}
	);

	$('lb_Overlay').setStyle('display','block');
	$('lb_Center').setStyle('display','block');
	var browserwidth = getWidth();
	var layerposition = (browserwidth/2);
	$('lb_Center').setStyle('left',layerposition-60);
	$('lb_Overlay').injectBefore('wrapper');
	$('lb_Center').injectBefore('wrapper');
	
	layerappear.start('0','0.6')

	$$('#lb_Overlay').addEvents({
		'click': function(){
			disappear();
		}
	});
}

function disappear(){
	var centerdis = new Fx.Tween('lb_Center', {
		property: 'opacity',
		duration: 500
	});
	var layerdisappear = new Fx.Tween('lb_Overlay', {
		property: 'opacity',
		onComplete: function(e) {
			centerdis.start('1','0');
		}
		}
	);
	layerdisappear.start('0.6','0');

}