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<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>饭桶教程(kuaikuaixuan.com)</title> </head> <body> <form> 按钮: <input type="button" id="firstbtn" value="OK"> <input type="button" id="secondbtn" value="OK"> </form> <p>点击下面的按钮取消上面的第一个按钮。</p> <button onclick="disableElement()">取消按钮</button> <script> function disableElement(){ document.getElementById("firstbtn").disabled=true; } </script> </body> </html>
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