function otvor(){
	var sirka;

	if(typeof(window.innerWidth) == 'number'){
		sirka = window.innerWidth;
	}else if(document.documentElement && document.documentElement.clientHeight){
		sirka = document.documentElement.clientWidth;
	}else if(document.body && document.body.clientWidth){
		sirka = document.body.clientWidth;
	}
	 
	var login = document.getElementById('prihlasenie');
	var sirkaLogin = 414;
	var left = (sirka/2) - (sirkaLogin/2);
	login.style.display="block";
	login.style.left=left+"px";
	var obr = document.getElementById('prihlasenieBG');
	obr.style.display="block";
	obr.style.left=left+"px";
 }

function zatvor(){
	var login = document.getElementById('prihlasenie');
	login.style.display="none";
	var obr = document.getElementById('prihlasenieBG');
	obr.style.display="none";
}

function mail_in(){
	var mailin = document.getElementById('mailin');
	if(mailin.style.display == 'none'){
		mailin.style.display="block";
	}else{
		mailin.style.display="none";
	}
}