<!doctype html public "-//w3c//dtd xhtml 1.0 transitional//en" "http://www.w3.org/tr/xhtml1/dtd/xhtml1-transitional.dtd"> <html xmlns="http://www.111cn.net/1999/xhtml"> <head> <meta http-equiv="content-type" content="text/html; charset=gb2312" /> <title>javascript选择当前页面所有checkbox 复选框代码</title> <script language="javascript"> function selectalls(state)  {     var inputs = document.getElementsByTagName("input");              for(var i=0; i< inputs.length; i++)     {         if(inputs[i].type == "checkbox")         {             inputs[i].checked =state;          }     } } </script> </head> <body>     <form id="form1" name="form1" method="post" action="">         <input type="checkbox" name="checkbox1" id="c1" />         <input type="checkbox" name="checkbox2" id="c2" />         <label for="checkbox"></label>         <input type="text" name="textfield" id="textfield" />         <input type="submit" name="button" id="button" value="按钮" onclick="javascript:selectalls(true);" />     </form>     <label for="textfield"></label>     <input type="button" name="button" id="button" value="按钮" onclick="javascript:selectalls(true);" />  </body> </html>


前后两个按钮都可以。

radio特殊一些,因为同名的radio有两个按钮,但又只能单选,所以必须根据它的value才能判断是哪一个(value不代表被选中):


function selectalls(state)  {     var inputs = document.getElementsByTagName("input");              for(var i=0; i< inputs.length; i++)     { //        if (i<=7) alert(inputs[i].name + "    " + inputs[i].value + "    "+ inputs[i].checked);         if ((inputs[i].type == "radio") && (inputs[i].value=='true'))         {             inputs[i].checked = state;          }     } }


<input type="button" name="button" id="button" value="<?php echo $ini_array['index.select.all']?>" onclick="javascript:selectalls(true);" />