错误信息如下：
错误： [Exception... "Component returned failure code: 0x80040111 (NS_ERROR_NOT_AVAILABLE) [nsIXMLHttpRequest.status]" nsresult: "0x80040111 (NS_ERROR_NOT_AVAILABLE)" location: "JS frame :: http://localhost:8088/youth/js/getTelInfo.js :: handleStateChange :: line 17" data: no]
源文件：http://localhost:8088/youth/js/getTelInfo.js
行：17
那一行的代码是
function handleStateChange(){
if(xmlHttp.readyState == 4){
if(xmlHttp.status == 200){
parseResults();
}
}
}
这个错误该怎么解决啊？