<?xml version="1.0" encoding="utf-8"?> <catalog> <cd> <ID>2</ID> <title>第1讲</title> <mediaUrl>123</mediaUrl> <htmlUrl>1.html</htmlUrl> <orderNo>2</orderNo> <StudyTimes>00:00:30</StudyTimes> <Secondss times="30000">1.html</Secondss> </cd> <cd> <ID>3</ID> <title>第2讲</title> <mediaUrl>123</mediaUrl> <htmlUrl>2.html</htmlUrl> <orderNo>2</orderNo> <StudyTimes>00:01:00</StudyTimes> <Secondss times="60000">2.html</Secondss> </cd> <cd> <ID>4</ID> <title>第3讲</title> <mediaUrl>123</mediaUrl> <htmlUrl>3.html</htmlUrl> <orderNo>2</orderNo> <StudyTimes>00:01:30</StudyTimes> <Secondss times="90000">3.html</Secondss> </cd> </catalog>

function times() { //定义array数组 var array =new Array(); //定义xmldom协议 var xmlDom =new ActiveXObject("Microsoft.XMLDOM"); xmlDom.async =false; //加载xml文件 xmlDom.load(id.value +"_imsmanifest.xml"); //跳转 try { //找到所有的Secondss x = xmlDom.getElementsByTagName("Secondss"); //遍历 for (i =0; i < x.length; i++) { //取times属性 var s = x[i].getAttribute("times"); //如果属性值小于 MediaPlayer.Controls.CurrentPosition * 1000则添加到数组里 if (s <= MediaPlayer.Controls.CurrentPosition *1000) { array.push(s); } } //排序array此时array[array.length - 1]就是小于MediaPlayer.Controls.CurrentPosition * 1000里面的最大值 array.sort(); }