js，ajax获取数据

function loading(){
    var xmlhttp = new XMLHttpRequest("http");
    xmlhttp.onreadystatechange = function(){
        if(xmlhttp.readyState == 4 && xmlhttp.status == 200 ){
            var json = xmlhttp.responseText.replace(/{|}/g,"").split(",");
            for(var i=0;i<json.length;i++){
                var json1 = json[i].split(":");
                var lDom = document.getElementById("list");
                var cDom = lDom.children;
                console.log(cDom[i]);
                cDom[i].innerHTML = json1[1];
            }
        }
    };
    xmlhttp.open("GET","./package.json",true);
    xmlhttp.send();


}