XMLDOM手册

（3）Microsoft.XMLHTTP，有如下属性：

Property	Description
readyState	Returns the state of the document
responseBody	Returns the response as an array of unsigned bytes
responseStream	Returns the response as an IStream
responseText	Returns the response as a string
responseXML	Returns the response as an xml document
status	Returns the status code as a number
statusText	Returns the status as a string

有如下方法：

Property	Description
abort()	Cancel the current http request
getAllResponseHeaders()	Returns the value of the http headers
getResponseHeader(headerName)	Returns the value of one specified http header
open(method, url, async, userid, password)	Opens http request, and specifies the information
send()	Send the http request to the server
setRequestHeader(headerName,headerValue)	Specifies the name of a http header