Ajax中onreadystatechange返回的状态

 

属性	描述
onreadystatechange	存储函数（或函数名），每当 readyState 属性改变时，就会调用该函数。
readyState	存有 XMLHttpRequest 的状态。从 0 到 4 发生变化。 0: 请求未初始化 1: 服务器连接已建立 2: 请求已接收 3: 请求处理中 4: 请求已完成，且响应已就绪
status	100:Continue 101:Switching protocols 200:OK 201:Created 202:Accepted 203:Non-Authoritative Information 204:No Content 205:Reset Content 206:Partial Content 300:Multiple Choices 301:Moved Permanently 302:Found 303:See Other 304:Not Modified 305:Use Proxy 307:Temporary Redirect 400:Bad Request 401:Unauthorized 402:Payment Required 403:Forbidden 404:Not Found 405:Method Not Allowed  406:Not Acceptable 407:Proxy Authentication Required 408:Request Timeout 409:Conflict 410:Gone 411:Length Required 412:Precondition Failed 413:Request Entity Too Large 414:Request-URI Too Long 415:Unsupported Media Type  416:Requested Range Not Suitable  417:Expectation Failed  500:Internal Server Error  501:Not Implemented 502:Bad Gateway 503:Service Unavailable 504:Gateway Timeout  505:HTTP Version Not Supported