I don't know if someone has already suggested this, but if you want to have
a lot of functionality without having to actually submit the page (hidden
frames still send a request back to the server) you should look at WDDX.
That will allow you to have all your client side functionality, and you only
need one submition.
Just a thought ;)
Scott Cavanaugh
Software Developer
Online Operations
Salem Communications Corporation
-----Original Message-----
From: Peter Theobald [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, February 21, 2001 9:20 AM
To: CF-Talk
Subject: Re: Allarie/Macromedia ColdFusion Feature Suggestion
Umm.. I hate to jump in on this, but he wasn't being a smart-ass so much as
being realistic. CF runs on the server. Javascript runs on the client. The
only conversation they have is through URL requests and form submits. The
only way to get information in Javascript variables is by submitting it in
URL or FORM variables. Even if you are doing it in a clever way, like inside
a hidden frame or from a Java or ActiveX component.
(of course you could write your own protocol that runs beside HTTP and have
a Java program running on the server, and another one running on the client
passing data through their own port. The client side program would attach to
IE or Netscape and use the DOM to get data. The server side program would
attach to the Cold Fusion server in some very tricky way....
well... you get the point... hardly worth reinventing the web instead of
just passing the variables to a Cold Fusion page inside a teeny-weeny hidden
frame)
At 10:00 AM 2/21/01 -0800, JoshMEagle wrote:
>Thanks for the smart-ass answer Philip. Sometimes you can't pass variables
>back to the server because you don't want to reload the page. Sometimes
>everything isn't in a Form>Submit>Form>Submit framework.
>
>"This is the kind of thing that Netscape was trying to do with LiveConnect.
>However, as we know the W3C didn't think much of this as a standard so it
>didn't go anywhere. You could do some pretty cool things with it though." -
>from Lanney Udey - Apparantly at least one other person thought this would
>be a good idea.
>
>Could it not be accomplished via an ActiveX control? Could the <cfscript>
>features not be extended to make the bridge between the client and the
>server? Sort of a client-side process of CF that can communicate with the
>server side? I realize that the CF gets processed on the server while the
JS
>gets processed on the client, but why couldn't CF be extended to
communicate
>across the two?
>
>"... CF server, is it meant to be psychic and predict which of the
thousands
>of users have which JavaScript variables - and what if the user has
>JavaScript disabled..." Well, there is the CFID/CFToken that could be
passed
>so that the server could "predict" who has JS variables ... the information
>would inevitably have to be sent to the server, but there could be some
kind
>of unseen resubmittal process that would allow CF to reprocess areas of the
>page within a <cfscript> tag. If the client doesn't have JavaScript
enabled,
>then things like <cfform> validation wouldn't work either. That's something
>you always have to deal with is the existance of JS. Obviously if you're
>using JS in a page you've thought this end of things out in the first
place.
>
>"CF7, the psychic platform that knows what you want before you even know
>yourself... a bit of quantum programming required, and don't forget to
>upgrade to Windows QT - the Quantum version of NT for Quantum machines." -
>For yoUr feciCious comebacK - You Ought repUdiate.
>
>Joshua Miller
>Web Development
>Eagle Technologies Group, Inc.
>Business Solutions for the Next Generation
>www.eagletgi.com
>[EMAIL PROTECTED]
>
>----- Original Message -----
>From: "Philip Arnold - ASP" <[EMAIL PROTECTED]>
>To: "CF-Talk" <[EMAIL PROTECTED]>
>Sent: Wednesday, February 21, 2001 6:00 AM
>Subject: RE: Allarie/Macromedia ColdFusion Feature Suggestion
>
>
>> > Proabably a bit late to place this request for 5.0 - but how about 6.0?
>> >
>> > Why don't you all make CF capable of grabbing JavaScript
>> > variables at will throughout the page using a function like
>> > scriptvar() or jsvar() or something like that? As many people as
>> > use ColdFusion together with JavaScript, this seems like it would
>> > have been addressed in version 1.0 - but now we're at 5.0 and
>> > still no mention of being able to easilly access JavaScript
>> > variables via CF.
>> >
>> > And no, I don't mean through a form submission, or in the URL or
>> > anything else - I mean mid page I'd like to be able to do something
>like:
>> >
>> > <script>
>> > colorval=thing.style.backgroundColor
>> > </script>
>> >
>> > <cfoutput>You're using color: #jsvar(colorval)#</cfoutput>
>> >
>> > Not the best example, but you get the idea. I'm sure it presents
>> > logistical problems since CF is processed on the server and JS on
>> > the client, but you all are bright folks, surely you can figure
>> > this one out :) (please?)
>>
>> Erm, just how is it meant to do this?
>>
>> JavaScript is Client side, CF is Server side - it doesn't really know
that
>> the user is the same one as the previous requester, so if the developer
is
>> too lazy to pass variables to the CF server, is it meant to be psychic
and
>> predict which of the thousands of users have which JavaScript variables -
>> and what if the user has JavaScript disabled? Is CF meant to know this
>> without checking?
>>
>> CF7, the psychic platform that knows what you want before you even know
>> yourself... a bit of quantum programming required, and don't forget to
>> upgrade to Windows QT - the Quantum version of NT for Quantum machines
>>
>> Philip Arnold
>> Director
>> Certified ColdFusion Developer
>> ASP Multimedia Limited
>> T: +44 (0)20 8680 1133
>>
>> "Websites for the real world"
>>
>> **********************************************************************
>> This email and any files transmitted with it are confidential and
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>> are addressed. If you have received this email in error please notify
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>>
>>
>>
>>
>
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