Очистить значение формы после отправки
<div id="sidebar-info">
<form name="contact-form" action="formprocess.php" method="post" target="ninja-frame">
<h1>By Phone</h1>
<p id="by-phone">XXX-XXX-XXXX</p>
<h1>By Email</h1>
<p id="form-row">Name</p>
<input name="name" id="name" type="text" class="user-input" value="">
<p id="form-row">Email</p>
<input name="email" id="email" type="text" class="user-input" value="">
<p id="form-row">Message</p>
<textarea name="message" id="message" class="user-input" rows="10" maxlength="1500"></textarea>
<p>*Please fill out every field</p>
<input type="submit" value="Submit" id="submit" onclick="submitForm()">
<script>
function submitForm() {
document.contact-form.submit();
document.contact-form.reset();
}
</script>
</form>
</div>
Kind Kitten