jQuery实现CheckBox全选、全不选

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 
<html xmlns="http://www.w3.org/1999/xhtml"> 
<head runat="server"> 
<title>jQuery实现CheckBox全选、全不选</title> 
<script src=\'#\'" href="http://code.jquery.com/jquery-1.4.4.min.js">http://code.jquery.com/jquery-1.4.4.min.js" type="text/javascript"></script>    <script type="text/javascript"> 
         $(function() { 
            $("#checkAll").click(function() { 
                $('input[name="subBox"]').attr("checked",this.checked);  
            }); 
            var $subBox = $("input[name='subBox']"); 
            $subBox.click(function(){ 
                $("#checkAll").attr("checked",$subBox.length == $("input[name='subBox']:checked").length ? true : false); 
            }); 
        }); 
</script> 
</head> 
<body> 
   <div> 
      <input id="checkAll" type="checkbox" />全选 
      <input name="subBox" type="checkbox" />项1 
      <input name="subBox" type="checkbox" />项2
      <input name="subBox" type="checkbox" />项3 
      <input name="subBox" type="checkbox" />项4 
   </div> 
</body> 
</html>

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