假设现在当前时间为7000毫秒。当时间为3000--6000是去3000的值，当6000--9000时取6000的值，即取xml中小于当前时间的最大值
xml文件，
2
第1讲
123
1.html
2
00:00:30
1.html
3
第2讲
123
2.html
2
00:01:00
2.html
4
第3讲
123
3.html
2
00:01:30
3.html
javascript：
MediaPlayer.Controls.CurrentPosition * 1000为当前时间
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 //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 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();
}
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