我有一个定制的PHP模板-表单。我正在尝试使用AJAX在同一页面中发送此表单，而无需重新加载页面。提交后隐藏表单并显示thank you 消息此表单以模式显示。但实际情况是，页面仍在重新加载。

HTML

<form method="POST" action="" name="modalForm" id="modalForm" enctype="multipart/form-data" autocomplete="off">
        <input placeholder="Last Name*" type="text" name="lastName" id="lastName" value="" required>
        <label class="error" for="name" id="lastName_error">This field is required.</label>
        <input placeholder="First Name*" type="text" name="firstName" id="firstName" value="" required>
        <label class="error" for="name" id="firstName_error">This field is required.</label>
        <input placeholder="Email Address" type="email" name="Email" id="Email" onblur="this.setAttribute(\'value\', this.value);" value="" required>
        <label class="error" for="email" id="email_error">This field is required.</label>
        <span class="validation-text">Please enter a valid email address.</span>
        <input placeholder="Mobile Number*" type="text" name="contactNumber" id="contactNumber" onkeypress="return isNumberKey(event)" value="" size="11" minlength="11" maxlength="11" pattern ="^09\\d{9}$" required>
        <label class="error" for="contactNumber" id="contactNumber_error">This field is required.</label>
        <input type="submit" name="submit" value="Submit" id="form-submit">
</form>

JS

    (function($) {
    $(\'.error\').hide();
    $(".button").click(function() {
      // validate and process form here

      $(\'.error\').hide();
        var name = $("input#lastName").val();
        if (lastName == "") {
        $("label#lastName_error").show();
        $("input#lastName").focus();
        return false;
      }
        var name = $("input#firstName").val();
        if (lastName == "") {
        $("label#firstName_error").show();
        $("input#firstName").focus();
        return false;
      }
        var email = $("input#Email").val();
        if (Email == "") {
        $("label#email_error").show();
        $("input#Email").focus();
        return false;
      }
        var phone = $("input#contactNumber").val();
        if (contactNumber == "") {
        $("label#contactNumber_error").show();
        $("input#contactNumber").focus();
        return false;
      }

    });

    var dataString = \'lastName=\'+ lastName + \'&Email=\' + Email + \'&contactNumber=\' + contactNumber;
  //alert (dataString);return false;
  $.ajax({
    type: "POST",
    url: "/wordpress-page/",
    data: dataString,
    success: function() {
      $(\'#modalForm\').html("<div id=\'message\'></div>");
      $(\'#message\').html("<h2>Contact Form Submitted!</h2>")
      .append("<p>We will be in touch soon.</p>")
      .hide()
      .fadeIn(1500, function() {
        $(\'#message\').append("<img id=\'checkmark\' src=\'images/check.png\' />");
      });
    }
  });
  return false;
});