Javascript 获取表单文本框中的值

Question

我想要:使用 Javascript 获取表单字段的值(表单中的文本输入)，并将它们全部添加在一起，将它们吐出到另一个标签或 div 中，所有这些都是在我按下按钮时完成的。

应该很容易吧？

编辑:我尝试了一些事情，但是，我没有考虑发布它们。我认为有人会用一些逻辑提示来回复，而不是一些没有洞察力的空间浪费。

<SCRIPT>
function add()
{
var a = document.getElementById("fscf_field4_8").value;
var b = document.getElementById("fscf_field4_10").value;
var c = document.getElementById("fscf_field4_12").value;
var d = document.getElementById("fscf_field4_14").value;
var e = document.getElementById("fscf_field4_16").value;
document.getElementById("fscf_field4_19").value =a+b+c+d+e;
}
</script>

<table>
<tr>
<td>
<div id="FSContact4" style="width:375px;">
<form action="/payment/#FSContact4" id="fscf_form4" method="post">
<input type="hidden" name="fscf_submitted" value="0">
<input type="hidden" name="fs_postonce_4" value="99193296484a8d52d2b9579199ca2f0c,1384214867">
<input type="hidden" name="si_contact_action" value="send">
<input type="hidden" name="form_id" value="4">

<div id="fscf_required4">
  <span style="text-align:left;">*</span> <span style="text-align:left;">indicates required field</span>
</div>

<input type="hidden" name="mailto_id" value="1">

<div id="fscf_div_clear4_4" style="clear:both;">
  <div id="fscf_div_field4_4" style="clear:left; float:left; width:99%; max-width:550px; margin-right:10px;">
    <div id="fscf_label4_4" style="text-align:left; padding-top:5px;">
      <label style="text-align:left;" for="fscf_field4_4">Company Name<span style="text-align:left;">*</span></label>
    </div>
    <div style="text-align:left;">
      <input style="text-align:left; margin:0;" type="text" id="fscf_field4_4" name="company-name" value="">
    </div>
  </div>
</div>

<div id="fscf_div_clear4_5" style="clear:both;">
  <div id="fscf_div_field4_5" style="clear:left; float:left; width:99%; max-width:550px; margin-right:10px;">
    <div id="fscf_label4_5" style="text-align:left; padding-top:5px;">
      <label style="text-align:left;" for="fscf_field4_5">Person Doing the Transaction<span style="text-align:left;">*</span></label>
    </div>
    <div style="text-align:left;">
      <input style="text-align:left; margin:0;" type="text" id="fscf_field4_5" name="person-doing-the-transaction" value="">
    </div>
  </div>
</div>

<div id="fscf_div_clear4_6" style="clear:both;">
  <div id="fscf_div_field4_6" style="clear:left; float:left; width:99%; max-width:550px; margin-right:10px;">
    <div id="fscf_label4_6" style="text-align:left; padding-top:5px;">
      <label style="text-align:left;" for="fscf_field4_6">email<span style="text-align:left;">*</span></label>
    </div>
    <div style="text-align:left;">
      <input style="text-align:left; margin:0;" type="text" id="fscf_field4_6" name="email01" value="">
    </div>
  </div>
</div>
</td>
</tr>
<tr>
<td>
<table border="1" bordercolor="#FFCC00" style="background-color:#FFFFCC" width="100%" cellpadding="3" cellspacing="3">
        <tr>
                <td>Invoice Number</td>
                <td>Amount (USD)</td>
        </tr>
        <tr>
                <td><input type="text" id="fscf_field4_7 name="Invoice Number 1"></td>
                <td><input type="text" id="fscf_field4_8 name="Amount 1"></td>
        </tr>
        <tr>
                <td><input type="text" id="fscf_field4_9 name="Invoice Number 2"></td>
                <td><input type="text" id="fscf_field4_10 name="Amount 2"></td>
        </tr>
        <tr>
                <td><input type="text" id="fscf_field4_11 name="Invoice Number 3"></td>
                <td><input type="text" id="fscf_field4_12 name="Amount 3"></td>
        </tr>
        <tr>
                <td><input type="text" id="fscf_field4_13 name="Invoice Number 4"></td>
                <td><input type="text" id="fscf_field4_14 name="Amount 4"></td>
        </tr>
        <tr>
                <td><input type="text" id="fscf_field4_15 name="Invoice Number 5"></td>
                <td><input type="text" id="fscf_field4_16 name="Amount 5"></td>
        </tr>
        <tr>
                <td><input type="button" value="Click to Calculate" onclick="add()"></td>
                <td><input type="text" id="fscf_field4_19"></td>
        </tr>
</table>
<div id="fscf_submit_div4" style="text-align:left; padding-top:2px;">
                <input type="submit" id="fscf_submit4" style="cursor:pointer; margin:0;" value="Submit">
</div>
</form>
</div>
</tr>
</td>
</table>

Answer 1

是的。这很容易。观察得很好!

编辑:现在您至少已经尝试提出一个严肃的问题，这里有一个基本示例，说明您可以采取哪些措施来开始。一个完整的解决方案将需要更多的工作，但您可以从中获得乐趣!

Live demo here (click).

  <form id="myForm">
    <input type="text">
    <input type="text">
    <input type="text">
  </form>
  <button id="process">Process</button>
  <div id="output"></div>

var button = document.getElementById('process');
var form = document.getElementById('myForm');
var outputDiv = document.getElementById('output');

button.addEventListener('click', function() {
  var frag = document.createDocumentFragment();

  var children = form.childNodes;
  for (var key in children) {
    var node = children[key];
    if (node.nodeName === 'INPUT') {
      var p = document.createElement('p');
      p.textContent = node.value;
      frag.appendChild(p);
    }
  }
  outputDiv.textContent = '';
  outputDiv.appendChild(frag);
});