Can jquery ajax be used in iframe inside runcode() in js file?

When I tried to add the above inside runcode(), it always pop up an error which can not access the json file. Not sure why? It usually works well if not using iframe.
$.ajax({
url: “datainfo.json”,
type: “GET”,
dataType: “json”,

success: function(data) {

json_data=JSON.parse(data)

console.info(json_data[‘object’])
$.each(data, function(i, item) {
console.log(i,item);
if(item.object == clickname.name){
parent.document.getElementById(“obj-name”).innerHTML = 1;
parent.document.getElementById(“obj-id”).innerHTML = 404;
parent.document.getElementById(“obj-price”).innerHTML = item.object;
}
})
},
error:function (msg) {
console.log(msg);
//alert(‘system error’);
}

});