摘要： documentFragment 是一个无父对象的document对象.他支持以下DOM2方法:appendChild, cloneNode, hasAttributes, hasChildNodes, insertBefore, normalize, removeChild, replaceChild.也支持以下DOM2属性:attributes, childNodes, firstChild, lastChild, localName, namespaceURI, nextSibling, nodeName, nodeType, nodeValue, ownerDocument, pare 阅读全文