之前在写编写“圳品”信息系统中，编写了通用的checkbox全选、全部取消、反选函数，详见：
利用eval（)打造通用的checkbox全选、全部取消、反选函数
现在又根据需要增加了几组checkbox，发现通用的checkbox全选、全部取消、反选函数不好使，不够通用了。
拿之前的写的代码分析，很容易就找到了原因：之前的代码做了一个假设，即每组ckeckbox的个数是11个以内，比如这个全选通用函数代码为：
//全选 function checkAll(s) { for (i=0; i < 11; i++) { eval（s)[i].checked = true; } }
但是新增的checkbox组突破了11个的范围，所以要修改代码了。
由于每组ckeckbox的个数是不固定的，所以最简单的解决办法就是把ckeckbox的个数也作为通过函数的参数传递进去，比如全选通用函数就改为：
//全选 //s:checkbox名，n:checkbox数量 function checkAll(s, n) { for (i=0; i < n; i++) { eval（s)[i].checked = true; } }
生成checkbox全选、全部取消、反选按钮的代码也同步修改：
function showCbStateBox(n,i) { document.write(' <input type="button" value="全选" onclick="checkAll(', "'", n, "'",',', i,')" />'); document.write(' <input type="button" value="全部取消" onclick="uncheckAll(', "'", n, "'",',',i, ')" />'); document.write(' <input type="button" value="反选" onclick="reverseCheck(', "'", n, "'",',', i, ')" />'); }
调用语句也做相应的修改，比如：
showCbStateBox("cbArea",aArea.length);
完整的代码如下：
<!DOCTYPE html> <html> <head> <meta name="Author" content="PurpleEndurer"> <title>“圳品”信息系统</title> </head> <body> <div id="divArea"> 县（区）： <script> //n:checkbox name, i:checkbox number function showCbStateBox(n,i) { document.write(' <input type="button" value="全选" onclick="checkAll(', "'", n, "'",',', i,')" />'); document.write(' <input type="button" value="全部取消" onclick="uncheckAll(', "'", n, "'",',',i, ')" />'); document.write(' <input type="button" value="反选" onclick="reverseCheck(', "'", n, "'",',', i, ')" />'); } aArea = new Array( "河池", //0 "金城江", //1 "宜州", //2 "罗城", //3 "环江", //4 "南丹", //5 "天峨", //6 "东兰", //7 "巴马", //8 "凤山", //9 "都安", //10 "大化"); //11 function showAreaChkBox() { var i; for (i = 0; i < aArea.length; i++) { document.write('<input type="checkbox" checked="true" name="',i,'" >',aArea[i],'</input> '); } showCbStateBox("cbArea",aArea.length); } showAreaChkBox(); </script> </div> <div id="divZpProg"> <strong>认证状态：</strong> <script> const aZpProg = new Array("已获评",//0 "已完成现场评价", //1 "待现场评价",//2 "待补充材料", //3 "未通过评价"//4 ); function showZpProgChkBox() { var i; document.write('<input type="checkbox" checked="true" name="cbZpProg0">',aZpProg[0],'</input> '); for (i = 1; i < aZpProg.length; i++) { document.write('<input type="checkbox" name="cbZpProg',i,'">',aZpProg[i],'</input> '); } showCbStateBox("cbZpProg",aZpProg.length); } showZpProgChkBox(); </script> </div> <div id="divCertYear"> 认证时间： <script> function showCertYearChkBox() { var i, d = new Date(); d = d.getFullYear(); for (i = 2020; i <= d; i++) { document.write('<input type="checkbox" checked="true" name="', i, '" >', i, '</input> '); } showCbStateBox("cbCertYear", i-2020); } showCertYearChkBox(); </script> </div> <div id="divCol"> 显示信息包含： <script> var g_aCol = new Array("序号","所属县区","企业名称","产品名称","证书编号","认证时间","有效期","备注"); function showColChkBox() { var i; for (i = 0; i < g_aCol.length; i++) { document.write('<input type="checkbox" checked="true" name="',i,'" >',g_aCol[i],'</input> '); } showCbStateBox("cbCol", g_aCol.length); } showColChkBox(); </script> </div> <script> var divArea = document.getElementById("divArea"); var cbArea = divArea.getElementsByTagName("input"); var divCol = document.getElementById("divCol"); var cbCol = divCol.getElementsByTagName("input"); var divZpProg = document.getElementById("divZpProg"); var cbZpProg = divZpProg.getElementsByTagName("input"); var divCertYear = document.getElementById("divCertYear"); var cbCertYear = divCertYear.getElementsByTagName("input"); //全选，s: checkbox name, n:checkbox number function checkAll(s, n) { for (i=0; i < n; i++) { eval（s)[i].checked = true; } } //全部取消，s: checkbox name, n:checkbox number function uncheckAll(s, n) { for (i=0; i < n; i++) { eval（s)[i].checked = false; } } //反选，s: checkbox name, n:checkbox number function reverseCheck(s, n) { for (i=0; i < n; i++) { eval（s)[i].checked = !eval（s)[i].checked; } } </script> </body> </html>
