js表單驗證方法1

                        <form role="form" name="form">
                            <fieldset>
                                <div class="form-group">
                                    <input class="form-control" placeholder="Username" name="username" type="email" autofocus>
                                </div>
                                <div class="form-group">
                                    <input class="form-control" placeholder="Password" name="password" type="password" value="">
                                </div>
                                <div class="checkbox">
                                    <label>
                                        <input name="remember" type="checkbox" value="Remember Me">Remember Me
                                    </label>
                                </div>
                                <a href="javascript:void(0)" class="btn btn-lg btn-success btn-block" οnclick="checkData()">Login</a>
                            </fieldset>
                        </form>

1.js代碼可以通過name獲取input裏面的值進行表單驗證

function checkData(){
	alert(document.form.username.value);
}

(1)只要在form標籤裏面加上name屬性
(2)通過value獲取文本框中的值