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在我成为之前，让我澄清一下我是 jQuery 和 JavaScript 的新手。很抱歉，如果答案很明显 好的，我正在尝试创建一个页面，用户可以在其中选择日期和时间，并希望使用 JavaScript 和 PHP 来确保用户没有返回空白字段（例如没有日期或时间设置并点击提交）。我正在使用 jQuery 的 datepicker 和 Jon Thornton 的 timepicker。我成功地创建了显示它的字段，但我不知道在 JavaScript 中调用它并检查的正确方法。这是我现在的代码：

    <script src="https://code.jquery.com/jquery-1.12.4.js"></script>
<script src="https://code.jquery.com/ui/1.12.1/jquery-ui.js"></script>
<link rel="stylesheet" href="//code.jquery.com/ui/1.12.1/themes/base/jquery-ui.css">
<script type='text/javascript' src='../jQuery/jonthornton-jquery-timepicker-dbdea8e/jquery.timepicker.js'></script>
<link rel='stylesheet' href='../jQuery/jonthornton-jquery-timepicker-dbdea8e/jquery.timepicker.css'>
<script>
  $( function() {
    $( "#datepicker" ).datepicker({maxDate: "+2M", dateFormat: 'yy-mm-dd'});
  } );
    $(function(){
   $('.scrollDefaultExample').timepicker({ 'scrollDefault': 'now' }); 
});
</script>

<script>
function validateForm() {
    var date = document.forms["Time_Slot"]["datePick"].value;
    var date2 = document.getElementById("datepicker");
    var main_timeSlot = document.forms["Time_Slot"]["timeSlot"].value;
    var add1 = document.forms["Time_Slot"]["additional_1"].value;
    var add2 = document.forms["Time_Slot"]["additional_2"].value;
    var add3 = document.forms["Time_Slot"]["additional_3"].value;
    var add4 = document.forms["Time_Slot"]["additional_4"].value;
    var add5 = document.forms["Time_Slot"]["additional_5"].value;
    var add1Box = document.forms["Time_Slot"]["additional_1_box"].value;
    var add2Box = document.forms["Time_Slot"]["additional_2_box"].value;
    var add3Box = document.forms["Time_Slot"]["additional_3_box"].value;
    var add4Box = document.forms["Time_Slot"]["additional_4_box"].value;
    var add5Box = document.forms["Time_Slot"]["additional_5_box"].value;
    alert("yolo");
    console.log(date);
    if (date2 == null || date == "" || date == " ") {
        alert("A date must be chosen!");
        return false;
    }
    else if (lname == null || lname == "" || lname == " ") {
        alert("The last name field should be complete!");
        return false;
    }
    else if (email == null || email == "" || email == " ") {
        alert("The email field should be complete!");
        return false;
    }
    else if (password == null || password == "" || password = " ") {
        alert("A valid password must be entered! Note: it cannot contain just a space.");
        return false;
    }
}
</script>

<form name="Time_Slot" method="POST">
    <fieldset>
        <p>Date: <input type="text" id="datepicker" name="datePick"></p>
        <p>Time: <input type="text" class="scrollDefaultExample" name="timeSlot"></p>
        <br>
        <label><input type="checkbox" name="additional_1" value="extra_1"> Additional Time Slot: <input type="text" class="scrollDefaultExample" name="additional_1_box"></label> <br><br>

        <label><input type="checkbox" name="additional_2" value="extra_2"> Additional Time Slot: <input type="text" class="scrollDefaultExample" name="additional_2_box"></label> <br><br>

        <label><input type="checkbox" name="additional_3" value="extra_3"> Additional Time Slot: <input type="text" class="scrollDefaultExample" name="additional_3_box"></label> <br><br>

        <label><input type="checkbox" name="additional_4" value="extra_4"> Additional Time Slot: <input type="text" class="scrollDefaultExample" name="additional_4_box"></label> <br><br>

        <label><input type="checkbox" name="additional_5" value="extra_5"> Additional Time Slot: <input type="text" class="scrollDefaultExample" name="additional_5_box"></label> <br><br>

        <p><input type="submit" name="submit" value="Create Available Appointments"  onclick="return validateForm()"></p>
    </fieldset>
</form>

当我点击按钮提交时，我没有被警告日期未设置。如果您能告诉我一个方法，将不胜感激。先感谢您！

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1 回答 1

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更进一步，为什么不实现 jQueryValidate？( https://jqueryvalidation.org/ )

对于您在这里需要的东西来说，这有点矫枉过正当您正在实现其他验证功能时，值得添加，但只需在输入元素中添加“必需”，它就会满足您的要求 - 当您开始开发更多功能时，您真的会喜欢可用的附加功能。

<!-- include the validation script, from CDN or download -->
<script src='    http://ajax.aspnetcdn.com/ajax/jquery.validate/1.15.0/jquery.validate.min.js'></script>

<!-- On document ready, find hte form and add the validation function -->
<script>
   $.ready(function() {
         $('form[name="Time_Slot"]').validate();
   });
</script> 

<!-- In the input, add "required" -->
<input type="text" id="datepicker" name="datePick" required>

代码未经测试编写，但足以让您入门。

于 2016-10-26T05:27:58.167 回答