var num_clicks=0;
var num_clicks_download=0;

function login(){
	if(num_clicks==0){
		document.getElementById("pantalla_login").style.display='block';
		document.getElementById("mail").focus();
		num_clicks=1;
	}else{
		document.getElementById("pantalla_login").style.display='none';
		num_clicks=0;
	}	
}

function cerrar(){
	document.getElementById("pantalla_login").style.display='none';
	num_clicks=0;
}


function download(){
	if(num_clicks_download==0){
		document.getElementById("pantalla_descarga").style.display='block';
		num_clicks_download=1;
	}else{
		document.getElementById("pantalla_descarga").style.display='none';
		num_clicks_download=0;
	}	
}

function cerrardownload(){
	document.getElementById("pantalla_descarga").style.display='none';
	num_clicks_download=0;
}