Untitled

<html lang="en">
<head>
        <meta charset="utf-8"/>
        <title> Join Github.Github</title>
        <link rel="stylesheet" href="Huy.css" type="text/css">
</head>
<body>
    <div id="container">
        <form name="contact" onsubmit="return CheckForm();" method="post" class="contact" style="font-family: Comic Sans MS">
            <h2 align="center" style="color:#9900ff ; font-size: 50px" > Tạo tài khoản </h2>
            <ul align="center">
                <li>
                    <label for="name"> Username <span class="required" class="required">*</span></label>
                    <input id="name" name="name" type="text" class="text" tabindex="1"/>
                    <p class="hide error" id="name-error"></p>
                </li>
                <li>
                    <label for="email"> Email address <span class="required" class="required">*</span></label>
                    <input id="email" name="email" placeholder="you@gmail.com" type="text" class="text" tabindex="1"/>
                    <p class="hide error" id="email-error"></p>
                </li>
                <li>
                    <label for="pass"> Password <span class="required" class="required">*</span></label>
                    <input id="pass" name="pass" type="text" class="text" tabindex="1"/>
                    <p class="hide error" id="pass-error"></p>
                </li>
                <li>
                    <input type="submit" name="create an account" value="Tạo tài khoản" class="btn-primary" style="margin-right: 20px" onclick="Createanaccount()"/>
                    <input type="reset" name="Delete" value="Xóa" class="btn1-primary" style="margin-right: 15px" onclick="Delete()"/>
                </li>
            </ul>
        </form>
    </div>
    <script>
        function CheckForm(){
            var user, email, pass, a=document.contact;
            if(a.name.value==""){
                document.getElementById("name-error").style.display='block';
                document.getElementById("name-error").innerHTML='Vui lòng nhập họ tên';
                a.name.focus();
                return false;
            }
            else document.getElementById("name-error").style.display='none';
            if(a.email.value==""){
                document.getElementById("email-error").style.display='block';
                document.getElementById("email-error").innerHTML='Vui lòng nhập email';
                a.email.focus();
                return false;
            }
            else document.getElementById("email-error").style.display='none';
            if(a.pass.value==""){
                document.getElementById("pass-error").style.display='block';
                document.getElementById("pass-error").innerHTML='Vui lòng nhập password';
                a.pass.focus();
                return false;
            }
            else document.getElementById("pass-error").style.display='none';
            return true;
        }

        user= contact.name.value;
        email=contact.email.value;
        pass=contact.pass.value;
        alert("Tạo tài khoản thành công!!!");

        function Delete()
            {
              Delete.user.value="0";
              Delete.email.value="0";
              Delete.pass.value="0";
            }
    </script>
</body>
</html>