W3School TIY Editor
W3School 在线教程
改变方向
暗黑模式
运行代码
<html> <head> <script type="text/javascript"> function alertComplete() { alert("Image loaded=" + document.getElementById("compman").complete) } </script> </head> <body onload="alertComplete()"> <img id="compman" src="/i/eg_compman.gif" alt="Computerman" /> </body> </html>