checkbox全選優(yōu)秀代碼

    <script language="javascript">
    function selectAll() //全選
    {
    var arrObj = document.all;
    for(var i = 0; i < arrObj.length;i++)
    {
    if(typeof arrObj[i].type != "undefined" && arrObj[i].type=='checkbox') arrObj[i].checked =true;
    }
    }
    function unSelectAll() //全不選
    {
    var arrObj = document.all;
    for(var i = 0; i < arrObj.length;i++)
    {
    if(typeof arrObj[i].type != "undefined" && arrObj[i].type=='checkbox') arrObj[i].checked =false;
    }
    }
    </script>