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Re: multi-page form [message #174697 is a reply to message #174685]

Tue, 28 June 2011 18:57

Peter H. Coffin
Messages: 245
Registered: September 2010

Karma:

Senior Member

On Mon, 27 Jun 2011 18:01:21 -0400, William Gill wrote:
> There are as few as 4 or 5 fields on some pages, but they may need/want
> to back up to see their earlier input.
>
> All I want is to prevent them from completing some fields; then backing
> up and losing their input.
>
> I'm thinking of creating an XMLHttpRequest object and using it to
> update session variables if a user backs up (triggered by the ONUNLOAD
> event),and then repopulating the fields when he/she returns (ONLOAD).
>
> Haven't done it in a while, and wanted to know if this is the best approach.

If the circumstance you're concerned about is (for example) a 3-page
form, a user being on page 2, entering data in a few fields, flipping
back to page one, flipping forward to page 2 again and the concern is
about whether the previous page-2 fields still have the entered data or
not, don't worry about it. It's all under the brower's control anyway.
If the user uses the page-forward button, the entered data will
*probably* still be there, but there's nothing you can do to control it
either way. If the user uses the "next page"/html submit button to go
forward, the entered data will probably *not* be there, but in this
case, you *still* can't do anything about it. And we're not even getting
into the whole molassas vat of what happens if the user changes
something and then uses those two different means of navigation...

Even the use of the javascript events doesn't necessarily fix the
behavior to one thing or the other, as web pages are *supposed to be*
fairly agnostic as to user agent. Not all user agents have javascript,
not all have it turned on, not all have complete implementations of
those events even if they do. (EG: some versions of Firefox trigger
..unload on a tab close, and trigger .load on a tab restore. Some don't.)

Short answer: PHP can't make a browser into a complex client interface
engine. It just won't work. Can't make a silk purse out of a pig's ear
either.

--
29. I will dress in bright and cheery colors, and so throw my enemies
into confusion.
--Peter Anspach's list of things to do as an Evil Overlord

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[Message index]

		multi-page form By: William Gill on Mon, 27 June 2011 16:40
		Re: multi-page form By: me on Mon, 27 June 2011 17:31
		Re: multi-page form By: William Gill on Mon, 27 June 2011 17:41
		Re: multi-page form By: me on Mon, 27 June 2011 18:24
		Re: multi-page form By: Jerry Stuckle on Mon, 27 June 2011 21:32
		Re: multi-page form By: William Gill on Mon, 27 June 2011 22:01
		Re: multi-page form By: me on Mon, 27 June 2011 22:18
		Re: multi-page form By: Graham Hobbs on Wed, 06 July 2011 00:06
		Re: multi-page form By: Jerry Stuckle on Mon, 27 June 2011 22:54
		Re: multi-page form By: William Gill on Tue, 28 June 2011 08:22
		Re: multi-page form By: Jerry Stuckle on Tue, 28 June 2011 10:53
		Re: multi-page form By: William Gill on Tue, 28 June 2011 16:13
		Re: multi-page form By: me on Tue, 28 June 2011 18:00
		Re: multi-page form By: Jerry Stuckle on Tue, 28 June 2011 19:02
		Re: multi-page form By: me on Tue, 28 June 2011 19:06
		Re: multi-page form By: me on Tue, 28 June 2011 19:46
		Re: multi-page form By: William Gill on Tue, 28 June 2011 20:05
		Re: multi-page form By: me on Tue, 28 June 2011 20:12
		Re: multi-page form By: me on Tue, 28 June 2011 20:20
		Re: multi-page form By: Jerry Stuckle on Tue, 28 June 2011 22:58
		Re: multi-page form By: Jeff North on Tue, 28 June 2011 23:30
		Re: multi-page form By: Jerry Stuckle on Wed, 29 June 2011 00:21
		Re: multi-page form By: Jeff North on Wed, 29 June 2011 04:52
		Re: multi-page form By: Jerry Stuckle on Wed, 29 June 2011 11:59
		Re: multi-page form By: me on Wed, 29 June 2011 12:09
		Re: multi-page form By: Jerry Stuckle on Wed, 29 June 2011 12:41
		Re: multi-page form By: me on Wed, 29 June 2011 12:48
		Re: multi-page form By: Jerry Stuckle on Wed, 29 June 2011 15:08
		Re: multi-page form By: me on Wed, 29 June 2011 16:27
		Re: multi-page form By: Jeff North on Wed, 29 June 2011 13:10
		Re: multi-page form By: Jerry Stuckle on Wed, 29 June 2011 15:09
		Re: multi-page form By: Michael Fesser on Wed, 29 June 2011 16:56
		Re: multi-page form By: Jerry Stuckle on Wed, 29 June 2011 19:32
		Re: multi-page form By: Peter H. Coffin on Tue, 28 June 2011 18:57
		Re: multi-page form By: Jeff North on Tue, 28 June 2011 22:46
		Re: multi-page form By: William Gill on Tue, 28 June 2011 23:29
		Re: multi-page form By: Jeff North on Wed, 29 June 2011 05:15
		Re: multi-page form By: Jerry Stuckle on Wed, 29 June 2011 12:01
		Re: multi-page form By: Michael Fesser on Wed, 29 June 2011 17:00
		Re: multi-page form By: Michael Fesser on Wed, 29 June 2011 17:05
		Re: multi-page form By: William Gill on Wed, 29 June 2011 17:44

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