115S站长学院 TIY
编辑您的代码：
<html> <head> <script type="text/javascript"> function makeCheck(thisForm) { for (i = 0; i < thisForm.option.length; i++) { thisForm.option[i].checked=true } } function makeUncheck(thisForm) { for (i = 0; i < thisForm.option.length; i++) { thisForm.option[i].checked=false } } </script> </head> <body> <form name="myForm"> <input type="button" value="选取" onclick="makeCheck(this.form)"> <input type="button" value="取消" onclick="makeUncheck(this.form)"> <br /> <input type="checkbox" name="option">苹果<br /> <input type="checkbox" name="option">桔子<br /> <input type="checkbox" name="option">香蕉<br /> <input type="checkbox" name="option">西瓜 </form> <script> var _hmt = _hmt || []; (function() { var hm = document.createElement("script"); hm.src = "https://hm.baidu.com/hm.js?72e1eb95f3722bd737488ab37f422304"; var s = document.getElementsByTagName("script")[0]; s.parentNode.insertBefore(hm, s); })(); </script> </body> </html>
查看结果: