function login(e)
{
	if (e == 'l')
	{
		document.getElementById("register").style.display = 'none';
		document.getElementById("login").style.display = 'block';
		document.getElementById("intro").style.visibility = 'hidden';
	}
	else
	{
		document.getElementById("register").style.display = 'block';
		document.getElementById("login").style.display = 'none';
		document.getElementById("intro").style.visibility = 'visible';
	}
}
function togPasswd(n)
{
	var pwA = 'pw' + n;
	var pwB = 'pw' + (n + 2);
	var passwdA = 'passwd' + n;
	var passwdB = 'passwd' + (n + 2);
	var btn_passwd = 'btn_passwd' + n;
	if (document.getElementById(pwA).style.display == 'none')
	{
		var pval = document.getElementById(passwdB).value
		document.getElementById(pwA).style.display = 'inline';
		document.getElementById(pwB).style.display = 'none';
		document.getElementById(passwdA).value = pval;
		document.getElementById(passwdB).value = '';
		document.getElementById(btn_passwd).value = "show password";
		document.getElementById(passwdA).focus();
	}
	else
	{
		var pval = document.getElementById(passwdA).value
		document.getElementById(pwA).style.display = 'none';
		document.getElementById(pwB).style.display = 'inline';
		document.getElementById(passwdB).value = pval;
		document.getElementById(passwdA).value = '';
		document.getElementById(btn_passwd).value = "mask password";
		document.getElementById(passwdB).focus();
	}
}