JS实现CheckBoxList的全选与反选[支持IE,FireFox]

<input id="checkAll" onclick="selectAll()" type="checkbox" />

 <script type="text/javascript">

    function selectAll()

    {       

        for(var i=0;i<document.getElementById("CheckBoxList1").getElementsByTagName("input").length;i++)

        {

            var IsCheck = document.getElementById("checkAll").checked;

            var a="CheckBoxList1_"+i;

            if(document.getElementById(a).checked==!IsCheck)

            document.getElementById(a).checked=IsCheck;

        }

    }    

    </script>