appendChild()和insertBefore

var area = document.getElementById("newArea");var newNode = document.createElement("input");newNode.type = "button";newNode.value = "这是测试加载的小例子";//newNode.setAttribute("type", "button");//newNode.setAttribute("value", "这是测试加载的小例子");newNode.onclick = function test(){alert("click");}var o = area.appendChild(newNode);