例 6.4：linkChangeCssFileIEFF.html 切换css文件：document.getElementsByTagName("link"); New Document function setActiveStyleSheet(t) { var links = document.getElementsByTagName("link"); links[0].disabled=false; links[1].disabled=true; links[2].disabled=true; alert(links[0].disabled+""+links[1].disabled+links[1].getAttribute("title")+links[2].getAttribute("href")); } 更多请见：https://blog.csdn.net/qq_43650923/article/details/102650892