var flag=0;
function login() {
	new Effect.Appear("ad_container", {
		from:0.1, 
		to:0.9, 
		delay:0, 
		fps:60, 
		duration: 1, 
        afterFinishInternal: function(effect) {
            flag=1;
        }
	});
}
function fadeout() {
    var item = $('ad_container');
    if(flag==1) {
	    new Effect.Fade("ad_container", {
	        from:0.9,
	        to:0.0,
	        fps:60,
	        duration:1,
	        afterFinishInternal: function(effect) {
    			Element.setStyle(item, {'display':'none'});
	            flag=0;
	        }
	    });
    }
}