小旋风SEO教程 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><link rel="canonical" href="https://www.xxfseo.com/w3c/tiy/t.asp-f=dhtm_form_selectall.html" /></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></body></html>
查看结果: