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http://www.ryerson.ca/JavaScript/lectures/forms/boxes.html
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<head runat="server"> <title></title> <script type="text/javascript"> window.onload = function () { document.getElementById("btnOperate").onclick = function () { var arr = new Array(); var items = document.getElementsByName("category"); for (i = 0; i < items.length; i++) { if (items[i].checked) { arr.push(items[i].value); } } alert("选择的个数为：" + arr.length); }; }; </script></head><body> <input type="checkbox" name="category" value="今日话题" /> <input type="checkbox" name="category" value="视觉焦点" /> <input type="checkbox" name="category" value="财经" /> <input type="checkbox" name="category" value="汽车" /> <input type="checkbox" name="category" value="科技" /> <input type="checkbox" name="category" value="房产" /> <input type="checkbox" name="category" value="旅游" /> <input id="btnOperate" type="button" value="选择" /></body></html>标签：
原文地址：http://www.cnblogs.com/jeremyjs/p/4409614.html
