input checkbox 全选

<!DOCTYPE Html>

<html>

    <head>

         <script type="text/javascript" src="http://code.jquery.com/jquery-1.4.4.min.js"></script>

         <script type="text/javascript">

             function selectAll(checkbox) {

                 $('input[type=checkbox]').attr('checked', $(checkbox).attr('checked'));

             }

         </script>

     </head>

     <body>

         <input type="checkbox" onclick="selectAll(this);" />全选<br/>

         <input type="checkbox"  /><br/>

         <input type="checkbox"  /><br/>

         <input type="checkbox"  /><br/>

         <input type="checkbox"  /><br/>

         <input type="checkbox"  /><br/>

         <input type="checkbox"  /><br/>

     </body>

</html>

//全选 

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function select_all(){ 

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    $("input[name='id']").attr("checked", true); 

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} 

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//全不选 

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function unselect_all(){ 

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    $("input[name='id']").attr("checked", false);  

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} 

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//反向选择 

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function select_other(){ 

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    jQuery.each($("input[name='id']"), function(i, n){ 

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    n.checked = !n.checked; 

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    });  

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}