需要通过json格式的javascript向服务器发送数据

我无法将数据从表单发布到服务器，但必须是json格式并使用ajax。如何在使用javascript时做到这一点&不能使用Jquery这里是我的问题…

<form id="contactus" action="http://wirehoer.net" method="post">
<fieldset>
    <!-- Contact Name
     -->
    <label for="name">Name:</label>
    <input name="name" id="name" type="text" pattern="\b[-'a-zA-Z]+,?\s[-'a-zA-Z]{0,19}\b" autofocus required>
    <span id="name-error" class="error">Please enter first & last name</span>
    <!-- Email 
    -->
    <label for="email">Email:</label>
    <input name="email" id="email" type="email" pattern="^\w+([-+.']\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*$" required>
    <span id="email-error" class="error">Please enter email address</span>
    <!-- Phone 
    -->
    <label for="phone">Phone:</label>
    <input name="phone" id="phone" type="tel" pattern="\d{10}" required>
    <span id="phone-error" class="error">Phone number must only contain numbers</span>
    <!-- Status - Client | Partner | Vendor 
    -->
    <label for="status">Status:         
        <select name="status" id="status">
            <option value="client">Client</option>
            <option value="partner">Partner</option>
            <option value="vendor">Vendor</option>
        </select>
    </label>
    <!-- Subscribe 
    -->
    <label for="subscribe">
    <input name="newsletter" id="subscribe" type="checkbox" value="on" checked>
        Send me your newsletter</label>
    <!-- Support - Sales | Support 
    -->
    <label class="needs" for="select_sales">
        <input id="select_sales" name="slsSelect" type="radio" value="sales" checked>Sales
    </label>
    <label class="needs" for="select_support">      
        <input id="select_support" name="slsSelect" type="radio" value="support">Support
    </label>
    <!-- Description 
    -->
    <label for="details">Message:</label>
    <textarea name="message" id="details" rows="10" cols="30"></textarea>
    <span id="details-error" class="error">Please describe what your request is</span>
</fieldset>

<fieldset>
    <button id= "send" type="submit">Send</button>
    <button type="reset">Reset</button>
</fieldset>
</form>
<!-- javascript validation 
-->
<script type="text/javascript" src="contactform_Lab11.js"></script>

</body>
</html> 

还要提前感谢

<form id="contactus" action="http://wirehoer.net" method="post">
<fieldset>
    <!-- Contact Name
     -->
    <label for="name">Name:</label>
    <input name="name" id="name" type="text" pattern="\b[-'a-zA-Z]+,?\s[-'a-zA-Z]{0,19}\b" autofocus required>
    <span id="name-error" class="error">Please enter first & last name</span>
    <!-- Email 
    -->
    <label for="email">Email:</label>
    <input name="email" id="email" type="email" pattern="^\w+([-+.']\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*$" required>
    <span id="email-error" class="error">Please enter email address</span>
    <!-- Phone 
    -->
    <label for="phone">Phone:</label>
    <input name="phone" id="phone" type="tel" pattern="\d{10}" required>
    <span id="phone-error" class="error">Phone number must only contain numbers</span>
    <!-- Status - Client | Partner | Vendor 
    -->
    <label for="status">Status:         
        <select name="status" id="status">
            <option value="client">Client</option>
            <option value="partner">Partner</option>
            <option value="vendor">Vendor</option>
        </select>
    </label>
    <!-- Subscribe 
    -->
    <label for="subscribe">
    <input name="newsletter" id="subscribe" type="checkbox" value="on" checked>
        Send me your newsletter</label>
    <!-- Support - Sales | Support 
    -->
    <label class="needs" for="select_sales">
        <input id="select_sales" name="slsSelect" type="radio" value="sales" checked>Sales
    </label>
    <label class="needs" for="select_support">      
        <input id="select_support" name="slsSelect" type="radio" value="support">Support
    </label>
    <!-- Description 
    -->
    <label for="details">Message:</label>
    <textarea name="message" id="details" rows="10" cols="30"></textarea>
    <span id="details-error" class="error">Please describe what your request is</span>
</fieldset>

<fieldset>
    <button id= "send" type="submit">Send</button>
    <button type="reset">Reset</button>
</fieldset>
</form>
<!-- javascript validation 
-->
<script type="text/javascript" src="contactform_Lab11.js"></script>

</body>
</html> 

• 如何通过处理HTTP 200并使用ajax将其转换并发送到服务器

<form id="contactus" action="http://wirehoer.net" method="post">
<fieldset>
    <!-- Contact Name
     -->
    <label for="name">Name:</label>
    <input name="name" id="name" type="text" pattern="\b[-'a-zA-Z]+,?\s[-'a-zA-Z]{0,19}\b" autofocus required>
    <span id="name-error" class="error">Please enter first & last name</span>
    <!-- Email 
    -->
    <label for="email">Email:</label>
    <input name="email" id="email" type="email" pattern="^\w+([-+.']\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*$" required>
    <span id="email-error" class="error">Please enter email address</span>
    <!-- Phone 
    -->
    <label for="phone">Phone:</label>
    <input name="phone" id="phone" type="tel" pattern="\d{10}" required>
    <span id="phone-error" class="error">Phone number must only contain numbers</span>
    <!-- Status - Client | Partner | Vendor 
    -->
    <label for="status">Status:         
        <select name="status" id="status">
            <option value="client">Client</option>
            <option value="partner">Partner</option>
            <option value="vendor">Vendor</option>
        </select>
    </label>
    <!-- Subscribe 
    -->
    <label for="subscribe">
    <input name="newsletter" id="subscribe" type="checkbox" value="on" checked>
        Send me your newsletter</label>
    <!-- Support - Sales | Support 
    -->
    <label class="needs" for="select_sales">
        <input id="select_sales" name="slsSelect" type="radio" value="sales" checked>Sales
    </label>
    <label class="needs" for="select_support">      
        <input id="select_support" name="slsSelect" type="radio" value="support">Support
    </label>
    <!-- Description 
    -->
    <label for="details">Message:</label>
    <textarea name="message" id="details" rows="10" cols="30"></textarea>
    <span id="details-error" class="error">Please describe what your request is</span>
</fieldset>

<fieldset>
    <button id= "send" type="submit">Send</button>
    <button type="reset">Reset</button>
</fieldset>
</form>
<!-- javascript validation 
-->
<script type="text/javascript" src="contactform_Lab11.js"></script>

</body>
</html> 

• 返回JSON时 对象的状态编码如下：{“status”：“---”}，其中“---”是“success”或“error”

<form id="contactus" action="http://wirehoer.net" method="post">
<fieldset>
    <!-- Contact Name
     -->
    <label for="name">Name:</label>
    <input name="name" id="name" type="text" pattern="\b[-'a-zA-Z]+,?\s[-'a-zA-Z]{0,19}\b" autofocus required>
    <span id="name-error" class="error">Please enter first & last name</span>
    <!-- Email 
    -->
    <label for="email">Email:</label>
    <input name="email" id="email" type="email" pattern="^\w+([-+.']\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*$" required>
    <span id="email-error" class="error">Please enter email address</span>
    <!-- Phone 
    -->
    <label for="phone">Phone:</label>
    <input name="phone" id="phone" type="tel" pattern="\d{10}" required>
    <span id="phone-error" class="error">Phone number must only contain numbers</span>
    <!-- Status - Client | Partner | Vendor 
    -->
    <label for="status">Status:         
        <select name="status" id="status">
            <option value="client">Client</option>
            <option value="partner">Partner</option>
            <option value="vendor">Vendor</option>
        </select>
    </label>
    <!-- Subscribe 
    -->
    <label for="subscribe">
    <input name="newsletter" id="subscribe" type="checkbox" value="on" checked>
        Send me your newsletter</label>
    <!-- Support - Sales | Support 
    -->
    <label class="needs" for="select_sales">
        <input id="select_sales" name="slsSelect" type="radio" value="sales" checked>Sales
    </label>
    <label class="needs" for="select_support">      
        <input id="select_support" name="slsSelect" type="radio" value="support">Support
    </label>
    <!-- Description 
    -->
    <label for="details">Message:</label>
    <textarea name="message" id="details" rows="10" cols="30"></textarea>
    <span id="details-error" class="error">Please describe what your request is</span>
</fieldset>

<fieldset>
    <button id= "send" type="submit">Send</button>
    <button type="reset">Reset</button>
</fieldset>
</form>
<!-- javascript validation 
-->
<script type="text/javascript" src="contactform_Lab11.js"></script>

</body>
</html> 

• 如果响应状态为“成功”，则应显示一条感谢消息 显示
• 如果响应状态为“错误”，则页面应显示“常规” “请求无法完成”等警告

  <form id="contactus" action="http://wirehoer.net" method="post">
  <fieldset>
      <!-- Contact Name
       -->
      <label for="name">Name:</label>
      <input name="name" id="name" type="text" pattern="\b[-'a-zA-Z]+,?\s[-'a-zA-Z]{0,19}\b" autofocus required>
      <span id="name-error" class="error">Please enter first & last name</span>
      <!-- Email 
      -->
      <label for="email">Email:</label>
      <input name="email" id="email" type="email" pattern="^\w+([-+.']\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*$" required>
      <span id="email-error" class="error">Please enter email address</span>
      <!-- Phone 
      -->
      <label for="phone">Phone:</label>
      <input name="phone" id="phone" type="tel" pattern="\d{10}" required>
      <span id="phone-error" class="error">Phone number must only contain numbers</span>
      <!-- Status - Client | Partner | Vendor 
      -->
      <label for="status">Status:         
          <select name="status" id="status">
              <option value="client">Client</option>
              <option value="partner">Partner</option>
              <option value="vendor">Vendor</option>
          </select>
      </label>
      <!-- Subscribe 
      -->
      <label for="subscribe">
      <input name="newsletter" id="subscribe" type="checkbox" value="on" checked>
          Send me your newsletter</label>
      <!-- Support - Sales | Support 
      -->
      <label class="needs" for="select_sales">
          <input id="select_sales" name="slsSelect" type="radio" value="sales" checked>Sales
      </label>
      <label class="needs" for="select_support">      
          <input id="select_support" name="slsSelect" type="radio" value="support">Support
      </label>
      <!-- Description 
      -->
      <label for="details">Message:</label>
      <textarea name="message" id="details" rows="10" cols="30"></textarea>
      <span id="details-error" class="error">Please describe what your request is</span>
  </fieldset>
  
  <fieldset>
      <button id= "send" type="submit">Send</button>
      <button type="reset">Reset</button>
  </fieldset>
  </form>
  <!-- javascript validation 
  -->
  <script type="text/javascript" src="contactform_Lab11.js"></script>
  
  </body>
  </html> 
  

  HTML

  <form id="contactus" action="http://wirehoer.net" method="post">
  <fieldset>
      <!-- Contact Name
       -->
      <label for="name">Name:</label>
      <input name="name" id="name" type="text" pattern="\b[-'a-zA-Z]+,?\s[-'a-zA-Z]{0,19}\b" autofocus required>
      <span id="name-error" class="error">Please enter first & last name</span>
      <!-- Email 
      -->
      <label for="email">Email:</label>
      <input name="email" id="email" type="email" pattern="^\w+([-+.']\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*$" required>
      <span id="email-error" class="error">Please enter email address</span>
      <!-- Phone 
      -->
      <label for="phone">Phone:</label>
      <input name="phone" id="phone" type="tel" pattern="\d{10}" required>
      <span id="phone-error" class="error">Phone number must only contain numbers</span>
      <!-- Status - Client | Partner | Vendor 
      -->
      <label for="status">Status:         
          <select name="status" id="status">
              <option value="client">Client</option>
              <option value="partner">Partner</option>
              <option value="vendor">Vendor</option>
          </select>
      </label>
      <!-- Subscribe 
      -->
      <label for="subscribe">
      <input name="newsletter" id="subscribe" type="checkbox" value="on" checked>
          Send me your newsletter</label>
      <!-- Support - Sales | Support 
      -->
      <label class="needs" for="select_sales">
          <input id="select_sales" name="slsSelect" type="radio" value="sales" checked>Sales
      </label>
      <label class="needs" for="select_support">      
          <input id="select_support" name="slsSelect" type="radio" value="support">Support
      </label>
      <!-- Description 
      -->
      <label for="details">Message:</label>
      <textarea name="message" id="details" rows="10" cols="30"></textarea>
      <span id="details-error" class="error">Please describe what your request is</span>
  </fieldset>
  
  <fieldset>
      <button id= "send" type="submit">Send</button>
      <button type="reset">Reset</button>
  </fieldset>
  </form>
  <!-- javascript validation 
  -->
  <script type="text/javascript" src="contactform_Lab11.js"></script>
  
  </body>
  </html> 
  

  联系我

  <form id="contactus" action="http://wirehoer.net" method="post">
  <fieldset>
      <!-- Contact Name
       -->
      <label for="name">Name:</label>
      <input name="name" id="name" type="text" pattern="\b[-'a-zA-Z]+,?\s[-'a-zA-Z]{0,19}\b" autofocus required>
      <span id="name-error" class="error">Please enter first & last name</span>
      <!-- Email 
      -->
      <label for="email">Email:</label>
      <input name="email" id="email" type="email" pattern="^\w+([-+.']\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*$" required>
      <span id="email-error" class="error">Please enter email address</span>
      <!-- Phone 
      -->
      <label for="phone">Phone:</label>
      <input name="phone" id="phone" type="tel" pattern="\d{10}" required>
      <span id="phone-error" class="error">Phone number must only contain numbers</span>
      <!-- Status - Client | Partner | Vendor 
      -->
      <label for="status">Status:         
          <select name="status" id="status">
              <option value="client">Client</option>
              <option value="partner">Partner</option>
              <option value="vendor">Vendor</option>
          </select>
      </label>
      <!-- Subscribe 
      -->
      <label for="subscribe">
      <input name="newsletter" id="subscribe" type="checkbox" value="on" checked>
          Send me your newsletter</label>
      <!-- Support - Sales | Support 
      -->
      <label class="needs" for="select_sales">
          <input id="select_sales" name="slsSelect" type="radio" value="sales" checked>Sales
      </label>
      <label class="needs" for="select_support">      
          <input id="select_support" name="slsSelect" type="radio" value="support">Support
      </label>
      <!-- Description 
      -->
      <label for="details">Message:</label>
      <textarea name="message" id="details" rows="10" cols="30"></textarea>
      <span id="details-error" class="error">Please describe what your request is</span>
  </fieldset>
  
  <fieldset>
      <button id= "send" type="submit">Send</button>
      <button type="reset">Reset</button>
  </fieldset>
  </form>
  <!-- javascript validation 
  -->
  <script type="text/javascript" src="contactform_Lab11.js"></script>
  
  </body>
  </html> 
  

  
  姓名：
  请输入名字和姓氏
  电邮：
  请输入电子邮件地址
  电话：
  电话号码必须仅包含号码
  地位：
  客户
  搭档
  小贩
  把你的通讯寄给我
  销售额
  支持
  信息：
  请描述一下你的要求
  发送
  重置
  

Javascript

<form id="contactus" action="http://wirehoer.net" method="post">
<fieldset>
    <!-- Contact Name
     -->
    <label for="name">Name:</label>
    <input name="name" id="name" type="text" pattern="\b[-'a-zA-Z]+,?\s[-'a-zA-Z]{0,19}\b" autofocus required>
    <span id="name-error" class="error">Please enter first & last name</span>
    <!-- Email 
    -->
    <label for="email">Email:</label>
    <input name="email" id="email" type="email" pattern="^\w+([-+.']\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*$" required>
    <span id="email-error" class="error">Please enter email address</span>
    <!-- Phone 
    -->
    <label for="phone">Phone:</label>
    <input name="phone" id="phone" type="tel" pattern="\d{10}" required>
    <span id="phone-error" class="error">Phone number must only contain numbers</span>
    <!-- Status - Client | Partner | Vendor 
    -->
    <label for="status">Status:         
        <select name="status" id="status">
            <option value="client">Client</option>
            <option value="partner">Partner</option>
            <option value="vendor">Vendor</option>
        </select>
    </label>
    <!-- Subscribe 
    -->
    <label for="subscribe">
    <input name="newsletter" id="subscribe" type="checkbox" value="on" checked>
        Send me your newsletter</label>
    <!-- Support - Sales | Support 
    -->
    <label class="needs" for="select_sales">
        <input id="select_sales" name="slsSelect" type="radio" value="sales" checked>Sales
    </label>
    <label class="needs" for="select_support">      
        <input id="select_support" name="slsSelect" type="radio" value="support">Support
    </label>
    <!-- Description 
    -->
    <label for="details">Message:</label>
    <textarea name="message" id="details" rows="10" cols="30"></textarea>
    <span id="details-error" class="error">Please describe what your request is</span>
</fieldset>

<fieldset>
    <button id= "send" type="submit">Send</button>
    <button type="reset">Reset</button>
</fieldset>
</form>
<!-- javascript validation 
-->
<script type="text/javascript" src="contactform_Lab11.js"></script>

</body>
</html> 

> //This will get the data of the fields
> document.getElementById('send').onclick=function(evt) {
> 
> var errors = false; //Gets all the inputs from contact form var
> myNodeList = document.querySelectorAll('input, textarea, select');
> 
> //Declar the vars //var i, val; // empty Array
> 
> //Start of loop  for (i = 0; i < myNodeList.length; i++) {
>     // Get element
>     val = myNodeList[i];
> 
>     //Get pattern attribute of regEx
>     regEx = new RegExp(val.getAttribute("pattern"));
> 
>     //Get Error message
>     err = document.getElementById(val.id+"-error")
> 
>     //By default, set the class to error, which hides the error message
>             err.className="error";
> 
>     //Test value "val" again the regEx
>     if(!regEx.test(val.value)){
>         //input fails and does not pass regEx test, set .display class
>         err.className+=" display";
> 
>         errors = true;
>     } } evt.preventDefault(); if(errors ===false){
>     document.getElementById("contactus").submit(); } };

//这将获取字段的数据
>document.getElementById（'send'）.onclick=function（evt）{
> 
>var errors=false；//从联系人表单var获取所有输入
>myNodeList=document.querySelectorAll（'input，textarea，select'）；
> 
>//删除变量//变量i，val；//空数组
> 
>//的循环开始（i=0；i//获取元素
>val=myNodeList[i]；
> 
>//获取正则表达式的模式属性
>regEx=newregexp（val.getAttribute（“模式”）；
> 
>//获取错误消息
>err=document.getElementById（val.id+“-error”）
> 
>//默认情况下，将类设置为error，这将隐藏错误消息
>err.className=“error”；
> 
>//再次在正则表达式中测试值“val”
>如果（！正则表达式测试（val.value））{
>//输入失败，未通过regEx测试，set.display类
>错误.className+=“显示”；
> 
>错误=正确；
>}evt.preventDefault（）；如果（错误===false）{
>document.getElementById（“contactus”）.submit（）；}；

您需要在对象中设置所需的所有数据，并在AJAX请求中将其作为JSON字符串发送

<form id="contactus" action="http://wirehoer.net" method="post">
<fieldset>
    <!-- Contact Name
     -->
    <label for="name">Name:</label>
    <input name="name" id="name" type="text" pattern="\b[-'a-zA-Z]+,?\s[-'a-zA-Z]{0,19}\b" autofocus required>
    <span id="name-error" class="error">Please enter first & last name</span>
    <!-- Email 
    -->
    <label for="email">Email:</label>
    <input name="email" id="email" type="email" pattern="^\w+([-+.']\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*$" required>
    <span id="email-error" class="error">Please enter email address</span>
    <!-- Phone 
    -->
    <label for="phone">Phone:</label>
    <input name="phone" id="phone" type="tel" pattern="\d{10}" required>
    <span id="phone-error" class="error">Phone number must only contain numbers</span>
    <!-- Status - Client | Partner | Vendor 
    -->
    <label for="status">Status:         
        <select name="status" id="status">
            <option value="client">Client</option>
            <option value="partner">Partner</option>
            <option value="vendor">Vendor</option>
        </select>
    </label>
    <!-- Subscribe 
    -->
    <label for="subscribe">
    <input name="newsletter" id="subscribe" type="checkbox" value="on" checked>
        Send me your newsletter</label>
    <!-- Support - Sales | Support 
    -->
    <label class="needs" for="select_sales">
        <input id="select_sales" name="slsSelect" type="radio" value="sales" checked>Sales
    </label>
    <label class="needs" for="select_support">      
        <input id="select_support" name="slsSelect" type="radio" value="support">Support
    </label>
    <!-- Description 
    -->
    <label for="details">Message:</label>
    <textarea name="message" id="details" rows="10" cols="30"></textarea>
    <span id="details-error" class="error">Please describe what your request is</span>
</fieldset>

<fieldset>
    <button id= "send" type="submit">Send</button>
    <button type="reset">Reset</button>
</fieldset>
</form>
<!-- javascript validation 
-->
<script type="text/javascript" src="contactform_Lab11.js"></script>

</body>
</html> 

  document.getElementById('send').onclick = function (evt) {

        var errors = false; //Gets all the inputs from contact form var
        myNodeList = document.querySelectorAll('input, textarea, select');
        var data = {};
        //Declar the vars //var i, val; // empty Array

        //Start of loop  
        for (i = 0; i < myNodeList.length; i++) {
            // Get element
            val = myNodeList[i].value;
            data[myNodeList[i].id] = val;
            //Get pattern attribute of regEx
            regEx = new RegExp(val.getAttribute("pattern"));

            //Get Error message
            err = document.getElementById(val.id + "-error")

            //By default, set the class to error, which hides the error message
            err.className = "error";

            //Test value "val" again the regEx
            if (!regEx.test(val.value)) {
                //input fails and does not pass regEx test, set .display class
                err.className += " display";

                errors = true;
            }
        }

        evt.preventDefault();
        if (errors === false) {
            var req = new XMLHttpRequest();

            req.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
            req.open('POST', 'http://wirehopper.net/ajax-submit.php');
            req.onload = function () {
                if(req.status == 200)
                    alert(req.response);
            }
            //TODO: implement error handling
            req.send(JSON.stringify(data));

        };
    }

document.getElementById（'send'）.onclick=function（evt）{
var errors=false；//从联系人表单var获取所有输入
myNodeList=document.querySelectorAll（'input，textarea，select'）；
变量数据={}；
//Declar变量//变量i，val；//空数组
//循环起点
对于（i=0；i

您基本上只是列出了您的项目需求，而不是问了一个特定的、基于代码的问题。我建议将您的问题缩减为一个特定的问题，只包括与该问题相关的代码。如果需要，您可以随时提出多个问题@Carlouuusys，ajax调用使用XMLHttpRequest对象

var req=new XMLHttpRequest（）这是如何发挥作用的req.setRequestHeader@CarlouuusWhile@Carlouuus完美地回答了这个问题，如果您不是XMLHttpRequest的粉丝（坦率地说，谁是……我的意思是，看看这个camelcasting），那么我建议您看看一些微框架来帮助您。刚刚发现这一点，它显示了某些框架是多么流行。对于AJAX来说看起来真的很好。如果您要做的不仅仅是一点AJAX，那么可能需要做一些更实质的事情，例如。