javascript数据缓存

if(!self.hotCityPrice[city]) {
$.ajax({
type: 'GET',
url: self.hotCityUrl,
data: {cityCode: city, t: new Date().getTime()},
success: function(res) {
if(res.bstatus.code == 0) {
try {
self.insertPriceListHtml(res.data.carTypes);
self.hotCityPrice[city] = res.data.carTypes;
} catch(e) {
}
} else {
alert(res.bstatus.des);
}
}
});
} else {
self.insertPriceListHtml(self.hotCityPrice[city]);
}