POST method in AJAX

[dmjpro]

Plz explain ....
why three lines added when the request made POST method using AJAX?

[code=javascript]
http_request.se tRequestHeader( "Content-type", "applicatio n/x-www-form-urlencoded");
http_request.se tRequestHeader( "Content-length", parameters.leng th);
http_request.se tRequestHeader( "Connection ", "close");
[/code]

Kind regards,
Dmjpro.

[iam_clint]

[CODE=javascript]
http_request.se tRequestHeader( "Content-type", "applicatio n/x-www-form-urlencoded"); // tells the server what the content type being sent is.
http_request.se tRequestHeader( "Content-length", parameters.leng th); // tells the server how long the content is.
http_request.se tRequestHeader( "Connection ", "close"); // tells the server to close the connection when its done.
[/CODE]

[dmjpro]

[CODE=javascript]
http_request.se tRequestHeader( "Content-type", "applicatio n/x-www-form-urlencoded"); // tells the server what the content type being sent is.
http_request.se tRequestHeader( "Content-length", parameters.leng th); // tells the server how long the content is.
http_request.se tRequestHeader( "Connection ", "close"); // tells the server to close the connection when its done.
[/CODE]

Would u be more in detaills??
I mean why????

Kind regards,
Dmjpro.

[acoder]

The difference between GET and POST is obvious. Using the GET method, you don't send anything through the send method whereas with POST you send data. For that, you set the headers.

[dmjpro]

The difference between GET and POST is obvious. Using the GET method, you don't send anything through the send method whereas with POST you send data. For that, you set the headers.

Why do we do it explicitly?

Why not JS engine do for us, as i mention the POST method in open function?
And one more thing.
what application/x-www-form-urlencoded does it mean?
Please explain.

Kind regards,
Dmjpro.

[acoder]

See this link which describes the POST headers.