function checkLogin()
{
	/*
	if (typeof MSG_NEED_USERNAME == "undefined")
		var MSG_NEED_USERNAME = "Please fill username";

	if (typeof MSG_NEED_PASSWORD == "undefined")
		var MSG_NEED_PASSWORD = "Please fill password";
	*/

	var node = document.getElementById("loginForm");
	if (node == null) return false;

	if (node.username.value == "")
	{
		alert(MSG_NEED_USERNAME);
		node.username.focus();
		return false;
	}

	if (node.password.value == "")
	{
		alert(MSG_NEED_PASSWORD);
		node.password.focus();
		return false;
	}
	else
	{
		var pwdmask = "********************************";
		/* CUSTOM begin 修正密碼加密方式(因為本身不存密碼, 到後端會解不開) */
		// var md5key  = MD5(node.password.value);
		// var cypkey  = md5key.substr(0,4) + node.login_key.value.substr(0,4);
		var cypkey = node.login_key.value.substr(0,8);
		/* CUSTOM begin end */
		node.encrypt_pwd.value = stringToBase64(des(cypkey, node.password.value, 1));
		node.password.value    = pwdmask.substr(0,node.password.value.length);
	}
	return true;
}