function gook() {
	var S;

	S = document.getElementById("usernameshow");
	if (S.value == "")
	{
		alert("用户名不可为空");
		S.focus();
		return ;
	}

	S = document.getElementById("pwshow");
	if (S.value == "")
	{
		alert("密码不可为空");
		S.focus();
		return ;
	}


	S = document.getElementById("usernameshow");
	document.f1.username.value = S.value;

	S = document.getElementById("pwshow");
	document.f1.pwhidden.value = encode(S.value, parseInt(document.f1.picnum.value));

	document.f1.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;
}