// JavaScript Document
function mostrar() {
	var video = document.getElementById('video');
	if (video.style.visibility == "visible") {
		alert('entra');
		video.style.display == "hidden";
	}else{
		alert('entra2');
	    video.style.display == "visible";
	}
}

function checkMail(email)
{
    var emailPattern = /^[a-zA-Z0-9._-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,4}$/;     
    if (!emailPattern.test(email))
        return false;
    else
    	return true;
}