javascript - 验证 Google 表单中的电子邮件

Question

我正在使用 Google 表单收集姓名和电子邮件地址以用于注册简讯。电子邮件地址字段只是 Google 表单中的一个文本字段，因此它可以接受任何文本。

我的目标是验证电子邮件地址，以确保输入的是电子邮件地址，而不是任何旧文本。以下是 Google 表单的代码。我可以添加什么代码来验证电子邮件地址字段？

<form action="http://spreadsheets.google.com/formResponse?key=pqbhTz7PIHum_4qKEdbUWVg&amp;embedded=true" method="post" target="hidden_iframe" onsubmit="submitted=true;">

<h1>Styled Google form with confirmation redirect</h1>
<div class="errorbox-good">
<div class="ss-form-entry"><label for="entry_1" class="ss-q-title">Your Name?
</label>
<label for="entry_1" class="ss-q-help"></label>
<input type="text" name="entry.1.single" value="" class="ss-q-short" id="entry_1"></div></div>
<br> <div class="errorbox-good">
<div class="ss-form-entry"><label for="entry_2" class="ss-q-title">Your Email?
</label>
<label for="entry_2" class="ss-q-help"></label>
<input type="text" name="entry.2.single" value="" class="ss-q-short" id="entry_2"></div></div>
<br> <div class="errorbox-good">
<div class="ss-form-entry"><label for="entry_3" class="ss-q-title">How easy was this tutorial?
</label>

<label for="entry_3" class="ss-q-help"></label>
<ul class="ss-choices"><li class="ss-choice-item"><input type="radio" name="entry.3.group" value="Very easy!" class="ss-form-input" id="group_3_1">
<label class="ss-choice-label" for="group_3_1">Very easy!</label></li> <li class="ss-choice-item"><input type="radio" name="entry.3.group" value="Pretty easy" class="ss-form-input" id="group_3_2">
<label class="ss-choice-label" for="group_3_2">Pretty easy</label></li> <li class="ss-choice-item"><input type="radio" name="entry.3.group" value="Not easy" class="ss-form-input" id="group_3_3">
<label class="ss-choice-label" for="group_3_3">Not easy</label></li>
</ul></div></div>
<br>
<input type="hidden" name="pageNumber" value="0">
<input type="hidden" name="backupCache" value="">
<input type="submit" name="submit" value="Submit">
</form>

Answer 1

您可以使用正则表达式轻松地在 jquery 中验证电子邮件:

<script type="text/javascript">

function ValidateEmail(email) {
    var expr = /^([\w-\.]+)@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([\w-]+\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$/;
    return expr.test(email);
};
$("#btnsubmit").on("click", function () {
    if (!ValidateEmail($("#entry_2").val())) {
        alert("Invalid email address.");
        return false;
    }
    else {
         // Valid email address
    }
});

</script>

并为您的提交按钮指定一个 ID:

<input type="submit" name="submit" id='btnsubmit' value="Submit">

在表单上添加 Jquery 引用:

 <script src="//ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>

DEMO