jquery ajax context

function yflib_roomList(tpl) {
var target = $(".roomList > li");
var _this = null;
$(".roomList > li").each(function(i, item) {
_this = $(this);
var _CloudID = _this.attr("CloudID");
getRoomDetailByID(_this, _CloudID, onDataRecieved);
});
function onDataRecieved(ret) {
var data = ret.data;
var html = tpl;
//遍历数据集，替换模板中相应的数据项
$.each(data, function(key, value) {
var re = new RegExp("{{\\s*data\\." + key + "\\s*}}", "g"); // \ 在双引号里面需要转义
//var re = new RegExp("{{data\\.CloudID}}","g"); // \ 在双引号里面需要转义
html = html.replace(re, value);
});
$(this).append(html);
}
}

function getRoomDetailByID(context, CloudID, callback) {
var url = "?s=Api/getRoomDetailByID";
$.ajax({
context: context, //传入上下文变量
url: url,
data: {"CloudID": CloudID},
dataType: "json",
success: callback,
error: function(xhr, status) {
$("#rs").html("return:<br />" + xhr.responseText);
}
});
}