如何在JavaScript中获取XML值

我想使用JavaScript和AJAX访问这个XML文件的每个lat和log值。我是否可以循环使用每个值并显示它们？我已经做了AJAX部分。非常感谢你的帮助。谢谢

           $.ajax({
                 type:'get',
                 url: "2017-04-25_163304_assign2017.gpx",
                 data: {
                    key: "value"
                    },
                 dataType: "xml",
                 success: function(xml){

                 }

---

134.752017-04-25T14:33:30Z
-30.522017-04-25T14:33:31Z
-13.172017-04-25T14:33:33Z
99.072017-04-25T14:33:34Z

getElementsByTagName和一个与循环相关的：––使用jQuery非常简单：

<?xml version="1.0"?>
<gpx version="1.0" creator="Ultra GPS Logger" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.topografix.com/GPX/1/0" xsi:schemaLocation="http://www.topografix.com/GPX/1/0 http://www.topografix.com/GPX/1/0/gpx.xsd">
<trk>
<name><![CDATA[assign2017]]></name>
<trkseg>
<trkpt lat="35.876466" lon="14.508177"><ele>134.75</ele><time>2017-04-25T14:33:30Z</time></trkpt>
<trkpt lat="35.876254" lon="14.508889"><ele>-30.52</ele><time>2017-04-25T14:33:31Z</time></trkpt>
<trkpt lat="35.876147" lon="14.509038"><ele>-13.17</ele><time>2017-04-25T14:33:33Z</time></trkpt>
<trkpt lat="35.876170" lon="14.508932"><ele>99.07</ele><time>2017-04-25T14:33:34Z</time></trkpt>
</trkseg>
</trk>
</gpx>