[Greasemonkey] replacing a script with my own

[esquifit]

GM can access the DOM (in particular <scripts> tags) only after it has been
completely built, and before it is rendered.  By the time GM runs, the code
contained in <script> tags has already been executed.  This makes sense IMHO
because the code within <script> tags could potentially modify or even
completelly specify (eg. document.write() ) the DOM that has to be rendered.

Even if one is sure about the script not modifying the document structure, I
do not know of any work-around (that would be fantastic, for instance for
getting rid of Red Sheriff intrusive scripts).


2006/9/13, jjazz <jvasile at gmail.com>:
>
>
> I frequent a website that loads a script in the head section with
>
> <script type="text/javascript" src=" review.js"></script>
>
> I would like Greasemonkey to get in there and replace review.js with
> another
> url-- i.e. one that points to my customized version.  I am having trouble
> getting in there and making the change.  I am doing the following, which
> does changes the src of the script tag, but doesn't affect the operation
> of
> the site.
>
> var allScripts = document.evaluate( '//script[@src]', document, null,
> XPathResult.UNORDERED_NODE_SNAPSHOT_TYPE, null);
> for (var i = 0; i < allScripts.snapshotLength; i++) {
>    var thisScript = allScripts.snapshotItem(i);
>    if (thisScript.src == 'http://url.of.site/review.js') {
>      thisScript.src = 'http://url.to.my.version/newscript.js';
>    }
> }
>
> I feel like I've missed somethig simple (I have little javascript or DOM
> experience).  Any hints would be most appreciated.
>
> Thanks.
> --
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> http://www.nabble.com/replacing-a-script-with-my-own-tf2264406.html#a6283229
> Sent from the MozDev - greasemonkey forum at Nabble.com<http://nabble.com/>
> .
>
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