function gook() 
{
	if (MailUserName.value == "")
	{
		alert("用户名不可为空");
		MailUserName.focus();
		return ;
	}

	if (MailPassword.value == "")
	{
		alert("密码不可为空");
		MailPassword.focus();
		return ;
	}

	formmail.saveUser.value = false;
	formmail.username.value = MailUserName.value;

	formmail.SecEx.value    = true;
	formmail.pwhidden.value = encode(MailPassword.value, parseInt(formmail.picnum.value));

	formmail.submit();
}


function encode(datastr, bassnum) 
{
	var tempstr;
	var tchar;
	var newdata = "";

	for (var i = 0; i < datastr.length; i++)
	{
		tchar = 65535 + bassnum - datastr.charCodeAt(i);
		tchar = tchar.toString();

		while(tchar.length < 5)
		{
			tchar = "0" + tchar;
		}

		newdata = newdata + tchar;
	}

	return newdata;
}