//检测登录
function checkLogin(){
    if (Trim($_Id("UserName").value)==""){
        alert("Please input UserName！");
        $_Id("UserName").focus();
        return false;
    }
    if (Trim($_Id("UserPwd").value)==""){
        alert("Please input Password！");
        $_Id("UserPwd").focus();
        return false;
    }
}

//留言
function checkGbook(){
    if (Trim($_Id("Title").value)==""){
        alert("Please input PRODUCTS！");
        $_Id("Title").focus();
        return false;
    }
    if (Trim($_Id("Email").value)==""){
        alert("Please input Email！");
        $_Id("Email").focus();
        return false;
    }
    if (Trim($_Id("Content").value)==""){
        alert("Please input Content！");
        $_Id("Content").focus();
        return false;
    }
}