IE7 the description of the Ajax open method new _ajax related

Open method assigns method, destination URL, and optional attributes of a pending request.
Syntax

XMLHttpRequest . Open ( smethod , surl [ , Basync ] [ , suser ] [ , Spassword ] )[/pre]

Parameters

Smethod	Required. String that specifies the HTTP method used to open the Connection:such as GET, POST, or head. This parameter isn't case-sensitive.
sURL	Required. String that specifies either the absolute or a relative URL of the XML data or server-side XML Web services.
Basync	Optional. Variant that specifies true to asynchronous operation (the call returns immediately), or false otherwise. If true, assign a callback handler to the onReadyStateChange property to determine while the call has completed. If not specified, the default is true.
Suser	Optional. Variant that specifies the name of the user for authentication. If This parameter is null ("") or missing and the site requires authentication, the component displays a logon window.
Spassword	Optional. Variant that specifies the password for authentication. This parameter was ignored if the user parameter is null ("") or missing.

Return Value

No return value.

Remarks

Openwas introduced in Internet Explorer 7.
The following HTTP verbs and world Wide Web Distributed Authoring and Versioning (WebDAV) methods ' m ') this.width= ' m ' F (this.height> ' m ') this.height= ' m '; "Border=0> are supported:

• Get
• POST
• Head
• Put
• DELETE
• Move
• PROPFIND
• Proppatch
• Mkcol
• COPY
• LOCK
• UNLOCK
• OPTIONS

Microsoft Internet Explorer caches the results of HTTP get requests in the Temporary Internet Files (TIF) folder. In most cases, the caching improves performance for data that is not change frequently. To guarantee so the results are not cached and use POST.

' this.width= '; if (this.height> ') this.height= '; "Border=0> security AlertCross-domain, Cross-port, and mixed protocol requests not are. The sURLParameter may only specify XML data files in the same domain, using the same port and protocol method, as this from which The page is served. Although this is accepts credentials passed via parameter, those credentials are not automatically sent to the server On the I request. The Suserand SpasswordParameters are not transmitted unless the server challenges the client for credentials with a 401-access Denied .
After calling this method, use Send to send the request and data, if all, to the server.

Applies To

XMLHttpRequest

Also

Abort, onreadystatechange