我正在编写下面的代码，用json格式从数据库返回的html表中显示数据success : function(data){

alert("declaring variable");

var output="

alert("creating output");

output+="

" + "" + "REPORTSUITE_ID" + "" + "" + "REPORTSUITE_NAME" + "" + "" + "STAGING_DATABASE" + "" + "" + "DWH_DATABASE" + "" + "";

alert("starting for loop");

for (var i in data)

{

output+="

" + "" + data[i].REPORTSUITE_ID + "" + "" +

""+data[i].REPORTSUITE_NAME + "" +

"

" + "" + data[i].STAGING_DATABASE + "" + "" + data[i].DWH_DATABASE + "" + "";

}

output+="

";

alert ("displaying now ");

document.getElementById("placeholder").innerHTML=output;

}

JSON中的数据格式如下：

^{pr2}$

当我执行上述代码时，得到的结果如下：REPORTSUITE_ID REPORTSUITE_NAME STAGING_DATABASE DWH_DATABASE

undefined undefined undefined undefined

undefined undefined undefined undefined

undefined undefined undefined undefined

请告诉我如何正确显示数据