删除：通过input标签查找所有添加的按钮，移除其中一个
代码示例：
<script>function add(){ var buttons = document.getElementById('buttons') buttons.innerHTML += ("<input type='button' value='新1'/>")}function del(){ var buttons = document.getElementById('buttons') var inputs =buttons.getElementsByTagName('input') if(inputs.length>0){ inputs[0].remove() }}</script></head><body><div id='buttons'></div><input type='button' value='添加' onclick='add()'/><input type='button' value='删除' onclick='del()'/></body>
<html><head>
<title>js动态的在页面上增加或删除一个文本框</title>
<script type="text/javascript">
<!--
var textNumber = 1
function addTextBox(form, afterElement) {
// Increment the textbox number
textNumber++
// Create the label
var p = document.createElement("p")
p.id="txt"+textNumber
var label = document.createElement("label")
// Create the textbox
var textField = document.createElement("input")
textField.setAttribute("type","text")
textField.setAttribute("name","biaozhundaan"+textNumber)
textField.setAttribute("id","biaozhundaan"+textNumber)
// Add the label's text
label.appendChild(document.createTextNode("第"+textNumber+"空: "))
// Put the textbox inside(里面)的//把文本框放进去
label.appendChild(textField)
// Add it all to the form fengshu
p.appendChild(label)
var label = document.createElement("label")
// Create the textbox
var textField = document.createElement("input")
textField.setAttribute("type","text")
textField.setAttribute("name","pingfengA"+textNumber)
textField.setAttribute("id","pingfengA"+textNumber)
// Add the label's text
label.appendChild(document.createTextNode("评分词"+textNumber+": "))
// Put the textbox inside(里面)的//把文本框放进去
label.appendChild(textField)
// Add it all to the form
p.appendChild(label)
var label = document.createElement("label")
// Create the textbox
var textField = document.createElement("input")
textField.setAttribute("type","text")
textField.setAttribute("name","fengshu"+textNumber)
textField.setAttribute("id","fengshu"+textNumber)
// Add the label's text
label.appendChild(document.createTextNode("分数"+textNumber+": "))
// Put the textbox inside(里面)的//把文本框放进去
label.appendChild(textField)
// Add it all to the form
//
p.appendChild(label)
form.insertBefore(p,afterElement)
return false
}
function removeTextBox(form) {
if (textNumber > 1) { // If there's more than one text box
// Remove the last one added
form.removeChild(document.getElementById("txt"+textNumber))
textNumber--
}
}
//-->
</script>
</head>
<body>
<form id="myForm" method="get" action="./" />
<label>Text Box #1a: <input type="text" name="txt1" id="txt1" /></label>
<p>
<input type="button" value="Add Textbox" onClick="addTextBox(this.form,this.parentNode) " />
<input type="button" value="Remove Textbox" onClick="removeTextBox(this.form)" />
</p>
<p><input type="Submit" value="Submit" /></p>
</form>
</body>
</html>
A标签没有form属性,所以this.form会失败,但INPUT标签有form属性,可以返回所在表单.只需要改一下调用即可,
<a href="#" onclick="addCheckDetail(document.getElementById('myForm'),this.parentNode)" >
另一处this.form按同样的方法修改.
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