form validation

<body>

        <div id = "content">
            <form id="myform">
                    Firstname<br>
                    <input type="text" size="43" name="name" pattern="[A-Z a-z]+" title="Must contain text only" onKeyPress="checkCapsLock( event )"value placeholder="Input  Firstname"  required><br>
                    <br>
                    Lastname: <br>
                    <input type="text" size="43" name="name" pattern="[A-Z a-z]+" title="Must contain text only" onKeyPress="checkCapsLock( event )" value placeholder="Input  Lastname" required><br>
                    <br>
                    Your E-mail : <br>
                    <input type="text" size="43" name="email" pattern="[a-z0-9._]+@[a-z0-9.-]+" title="Must  contain @ sign" value placeholder="Input  your E-mail" required ><br>
                    <br>
                    Password:<br>
                     <input type="password" size="43" name="pw" pattern="(?=.*\d)(?=.*[a-z])(?=.*[A-Z]).{8,}"
                                        title="Must contain at least one number and one uppercase and lowercase letter, and at least 8 or more characters" value placeholder="Input  Password" required><br>
                    <br>
                    Country:<br>
                    <select name= "country" required>
                    <option value="Australia">Australia</option>
                    <option value="Badakhshan">Badakhshan</option>
                    <option value="Canada">Canada</option>
                    <option value="Denmark">Denmark</option>
                    <option value="England">England</option>
                    <option value="United State of America">United State of America</option>
                    <option value="Philippines">Philippines</option>
                    </select><br>
                    <br>
                     Gender: &nbsp &nbsp
                    <input type="radio" name="colors" id="red">  Male
                    <input type="radio" name="colors" id="blue"> Female<br>
                    <br>
                    Language: <input type="checkbox" id="myCheck">English
                     <input type="checkbox" id="myCheck">Tagalog
                    <input type="checkbox" id="myCheck">Bisaya<br>
                    <br><center>
                    <input type="submit" value="CLICK TO CONFIRM "> &nbsp  &nbsp <input TYPE="Reset" value="CANCEL">
                    </center>
            </form>
    </body>