Detect whether a document was changed

hi all,
is there any "good" method to detect if the document was modified by the user? I tried

At onLoad of FCKEditor

originalContent = document.frames["wwContent"].objContent.DOM.body.innerHTML;

Later:

var curVal = document.frames["wwContent"].objContent.DOM.body.innerHTML;

if( originalContent != curVal ) return true;

But this fails always reproducable the first time I use the editor after starting IE and works fine after any further reload. Thats is why I am seeking for a better alternative.

Any ideas?

Tue, 09/30/2003 - 05:50

crowcomputer

Joined: 11/07/2003

Posts: 40

RE: Detect whether a document was changed

What do you mean it fails? You mean it returns true when it shouldn't or false when it shouldn't or does it cause IE to crash?

You could try taking an MD5 Hash of the content before and doing an MD5 Hash after you complete to make sure they haven't changed, wouldn't eat up as much memory but might be too CPU intensive...

search for an MD5 Hash algorithm in Javascript and try that.

Wed, 10/01/2003 - 01:31

farberg

Joined: 30/09/2003

Posts: 3

RE: Detect whether a document was changed

By failing I mean IE throwing a JavaScript error which I can not trace down, not even by debugging the thing. The hashing idea is nice, but is "only" an optimization.

What is the best way of retrieving the initial editor content in fckeditor.html, which event would suffice? Maybe saving the value only one time at onEditing?

Thank you, Dennis

Sat, 10/18/2003 - 19:33

crowcomputer

Joined: 11/07/2003

Posts: 40

RE: Detect whether a document was changed

Unless you are trying to add an "IsDirty" property to the Editor I would just say do this server side. There is also a hidden input in the editor where the source is stored you could check that value against the saved value....

Mon, 10/20/2003 - 02:10

farberg

Joined: 30/09/2003

Posts: 3

RE: Detect whether a document was changed

I could do it on the server side, but i want the user to confirm that his changes are not saved if he clicks on a link.