JS实现全选，用于界面批量操作向后台传值时使用

function seltAll(){
    var chckBoxSign = document.getElementById("ckb");       //ckb 全选/反选的选择框id
    var chckBox = document.getElementsByName("chckBox");    //所有的选择框其那么都是chckBox
    var num = chckBox.length;
    if(chckBoxSign.checked){
        for(var index =0 ; index<num ; index++){
            chckBox[index].checked = true;
            }
    }else{
        for(var index =0 ; index<num ; index++){
            chckBox[index].checked = false;
            }
        }
    }  

function deleSeltedRecords(){
    var chckBox = document.getElementsByName("chckBox");
    var num = chckBox.length;
    var ids = "";
    for(var index =0 ; index<num ; index++){
        if(chckBox[index].checked){
            ids += chckBox[index].value + ",";
        }
    }
    if(ids!=""){
        if(window.confirm("确定删除所选记录？")){
            $.ajax( {
                type : "post",
                url : '../servlet/UserController?oper=33&ids=' + ids, //要自行删除的action
                dataType : 'json',
                success : function(data) {
                    alert("删除成功");
                    window.location.href = "" ;
                },
                error : function(data) {
                    alert("系统错误，删除失败");
                }
            });
        }
    }else{
        alert("请选择要删除的记录");
        }
    }