安科网
源代码：
点击运行
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>安科教程(www.ancii.com)</title> <link id="link1" href="domoarigato.htm" hreflang="ja"> <script> function displayResult(){ var x=document.getElementById("link1").hreflang; alert(x); } </script> </head> <body> <button type="button" onclick="displayResult()">显示链接元素的文档语言</button> </body> </html>
运行结果
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