js 动态添加标签

function add()
{
var element=document.getElementById("mydiv");
var mybutton=document.createElement("input");//生成一个新标签
mybutton.setAttribute("type", "button");/*设置标签的属性*/
mybutton.setAttribute("value", "mybutton");
mybutton.type = "button";
mybutton.value = "动态添加按钮";
element.appendChild(mybutton);//将标签添加到一个便签里
}