CheckBox全选功能实现

 <script type="text/javascript">
        $(function(){           
            $("#checkAll").click(function(){
                if(this.checked==true)
                {
                   $(":checkbox:not(input[id='checkAll'])").attr('checked',true);
                }
                else
                {
                    $(":checkbox:not(input[id='checkAll'])").attr('checked',false);
                }
            })
        })
  
</script>