JavaScript动态添加表单元素：使用appendChild实现input与button

var newInput = document.createElement("input"); 

newInput.type=mytype;  
newInput.name="input1"; 

TemO.appendChild(newInput); 

<script language="javascript"> 
function AddElement(mytype){ 
var mytype,TemO=document.getElementById("add"); 
var newInput = document.createElement("input");  
newInput.type=mytype;  
newInput.name="input1"; 
TemO.appendChild(newInput); 
var newline= document.createElement("br");//创建一个BR标签是为能够换行！ 
TemO.appendChild(newline); 
} 
</script> 

<html > 
<head> 
<title>动态添加表单元素</title> 
</head> 
<script language="javascript"> 
function AddElement(mytype){ 
var mytype,TemO=document.getElementById("add"); 
var newInput = document.createElement("input"); 
newInput.type=mytype; 
newInput.name="input1"; 
TemO.appendChild(newInput); 
var newline= document.createElement("br"); 
TemO.appendChild(newline); 
} 
</script> 
<body> 
 <form action="" method="get" name="frm"> 
 <div id="add"> 
      <input type="text" name="textfield"><br> 
</div> 
 </form> 
 <input name="" type="button" value="新建文本框" onClick="AddElement('text')" /> 
 <input name="" type="button" value="新建复选框" onClick="AddElement('checkbox')" /> 
 <input name="" type="button" value="新建单选框" onClick="AddElement('radio')" /> 
 <input name="" type="button" value="新建文件域" onClick="AddElement('file')" /> 
 <input name="" type="button" value="新建密码框" onClick="AddElement('password')" /> 
 <input name="" type="button" value="新建提交按钮" onClick="AddElement('submit')" /> 
 <input name="" type="button" value="新建恢复按钮" onClick="AddElement('reset')" /> 
</body> 
</html>