function InitAllParameter() {
    var _ProductControl = $('#sProduct');
    var _Level1Control = $('#sLevel1');
    var _Level2Control = $('#sLevel2');
    var _Level3Control = $('#sLevel3');

    $.ajax({
        type: "get",
        async: false,
        url: "/OA/Ashx/Search.ashx?type=InitAllParameter",
        contentType: "application/json; charset=utf-8",
        cache: false,
        error: errorFunction,
        success: function (data) {
            var json = eval(data); //数组
            var contentmsg = "<option value=''>Select</option>";
            _ProductControl.html(contentmsg);
            _Level1Control.html(contentmsg);
            _Level2Control.html(contentmsg);
            _Level3Control.html(contentmsg);
            $.each(json.LEProductDt, function (index, item) {
                  //....
            });

            var basicLength = json.LEBaiscLevelDt.length;
            $('#knowledge-basic').html('');
            var basicContent = "";
            var arrayObj = new Array();

            for (var j = 0; j < Math.ceil(basicLength / 4); j++) {
                for (var i = 0; i < 4; i++) {
                    //此处代码省略
                }
            }
        }
    });
};                

var _Level2Control = $('#sLevel2');

i=$("#sLevel2")

for (var i = 0; i < 4; i++) {
                    //此处代码省略
                }

var _ProductControl = $('#sProduct');
    var _Level1Control = $('#sLevel1');
    var _Level2Control = $('#sLevel2');
    var _Level3Control = $('#sLevel3');