jquery checkbox全選/全不選を実現する汎用書き方

 
  
 
  
 
  
 
  
     
  
     
  <br>        //name  html          chechbox    ，    id(    )       
  <br>        function getValues() { 
  <br>            var aV = getCheckboxValues("a"); 
  <br>            var bV = getCheckboxValues("b"); 
  <br>            var cV = getCheckboxValues("c"); 
  <p></p> 
  <p>            var result = "a    : " + (aV=="" ? "      " : aV) + "
" +<br>                "b    : " + (bV == "" ? "      " : bV) + "
" +<br>                "c    : " + (cV == "" ? "      " : cV);</p> 
  <p>            alert(result);<br>        }</p> 
  <p>        function getCheckboxValues(name) {<br>            return $(":checkbox[name="+name+"]:checked").map(function(){  <br>                return $(this).val(); <br>            }).get().join(",");<br>        }</p> 
  <p>        function chkAll(obj) {<br>            var name = $(obj).attr("name");<br>            //           ，  jquery     ，           <br>            //1. jquery 1.6   <br>            //$(":checkbox[name=" + name.substring(0, 1) + "]").prop("checked", $(obj).prop("checked"));<br>            //2. jquery 1.6   <br>            //$(":checkbox[name=" + name.substring(0, 1) + "]").attr("checked", $(obj).attr("checked"));<br>            //3.     <br>            $(":checkbox[name=" + name.substring(0, 1) + "]").each(function () {<br>                this.checked = obj.checked;<br>            });<br>        }<br>    


    

         1 (a)：  /   
        a1
        a2
        a3
        a4
 
  
         2 (b)：  /   
        b1
        b2
        b3
        b4
 
  
         3 (c)：  /   
        c1
        c2
        c3
        c4