自学教程(runoops.com)

<!DOCTYPE html>
<html>

<head>
    <meta charset="utf-8" />
    <title>自学教程(runoops.com)</title>

x = xmlDoc.getElementsByTagName("CD");
        i = 0;

function displayCD() {
            artist = (x[i].getElementsByTagName("ARTIST")[0].childNodes[0].nodeValue);
            title = (x[i].getElementsByTagName("TITLE")[0].childNodes[0].nodeValue);
            year = (x[i].getElementsByTagName("YEAR")[0].childNodes[0].nodeValue);
            txt = "Artist: " + artist + "<br>Title: " + title + "<br>Year: " + year;
            document.getElementById("showCD").innerHTML = txt;
        }

function next() {
            if (i < x.length - 1) {
                i++;
                displayCD();
            }
        }

function previous() {
            if (i > 0) {
                i--;
                displayCD();
            }
        }
    </script>
</head>

</body>

</html>