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
    }