使用JavaScript中的document.anchor属性可获取具有name属性的文档中的锚点数（<a>）。
您可以尝试运行以下代码以在JavaScript中实现document.anchors属性-
<!DOCTYPE html>
<html>
<head>
<title>JavaScript Example</title>
</head>
<body>
<p>
<a href="/java/index.htm">Java</a><br>
<a href="/php/index.htm">PHP</a><br>
<a name="Ruby Tutorial">Ruby</a><br>
<a name="WordPress Tutorial">WordPress</a>
</p>
<script>
var num1 = document.links.length;
var num2 = document.anchors.length;
document.write("How many links? "+num1);
document.write("<br>How many anchors? "+num2);
</script>
</body>
</html>