html form(檢查觸發在onClick上)
<form action="login/doLogin" method="post" name="f_login"> <?php echo csrf_field(); ?> <input type="text" name="login_email" id="eamil" class="form-control" placeholder="帳號或信箱" /></br> <input type="password" name="login_pwd" id="pwd" class="form-control" placeholder="密碼" /></br> <input type=button VALUE="登入" class="btn btn-lg btn-primary btn-block" onClick="validateForm(this.form)"> <br> </form>
javascript(放置在head)
<script> function validateForm(form){ if(form.login_email.value=="" || form.login_pwd.value==""){ alert("帳號或是密碼欄不得為空"); return -1; } form.submit(); return 0; } </script>