Javascript/PHP interaction

[Brad Everman]

Suppose I have a bunch of DOM objects (namely images) and want to pass the
attributes of these DOM objects to a PHP script. What is the easiest way
to accomplish this? Basically, I have a bunch of images that can be
manipulated by Javascript and want to determine their final locations
after the user is done moving them. For instance, one of the attitbutes
might be dd.elements.cir cle1.h, where h is the height of the image named
circle1. This height is set when the page is loaded, but may change as the
user manipulates the circle. Would I be better off just writing a bunch of
form data then passing this to PHP? I vaguely remember seeing something
about manipulating session variables with Javacript.

Thanks for any help.

[Christoph Burschka]

Re: Javascript/PHP interaction

Brad Everman schrieb:

Suppose I have a bunch of DOM objects (namely images) and want to pass the
attributes of these DOM objects to a PHP script. What is the easiest way
to accomplish this? Basically, I have a bunch of images that can be
manipulated by Javascript and want to determine their final locations
after the user is done moving them. For instance, one of the attitbutes
might be dd.elements.cir cle1.h, where h is the height of the image named
circle1. This height is set when the page is loaded, but may change as the
user manipulates the circle. Would I be better off just writing a bunch of
form data then passing this to PHP? I vaguely remember seeing something
about manipulating session variables with Javacript.
>
Thanks for any help.

Communicating between Javascript and the server is best done with an
XMLHttpRequest. Essentially, the script makes a call back to the server
(probably using POST, in your case, and sending the data manipulated
by the user), the server processes it and then returns a response that
the script can parse.

Note that even though it's called "XML", the request and response don't
need to be formatted as XML, which can save a lot of time if you haven't
worked with XML document definitions before.

This is somewhat helpful: http://en.wikipedia.org/wiki/XMLHttpRequest

--
CB