Can't find the fault in this code

Greetings,

I've registered to this board specifically for this problem, though I'm beginning to suspect that I'll be here MUCH more often.

Recently I've tried to add a Lightbox script to an already existing page that already had a javascript feature in it. Now I know that there's no limit to the number of scripts you can run simultaneously, but when I added the lightbox feauture, my compiler gave me the following error:

$ is not defined
this.elements = $(this.options.thumb...lements(this.options.itemsSelector);

This line of code was part of the original source code of the page, and hadn't been a problem before I added the Lightbox code. Why is $ undefined all of a sudden and where can I find a solution for this? Could someone point me in the right direction here? I'm not exactly a novice(yet) when it comes to Javascript and this project was due yesterday.
I'd appreciate it if you guys could help me.

http://api.jquery.com/jQuery.noConflict/

That's not valid JavaScript, so there's a problem with the original source-code. Where did you get that from?

Thanks Fang, I'm trying out your solution right now.

@Declan: The line of code I posted is from the .js file of the original index.html page (it was a template).

Quote:

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Originally Posted by Dwinna

@Declan: The line of code I posted is from the .js file of the original index.html page (it was a template).

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But did you take the line from the error console? It's obviously not complete with the ellipsis in the middle.

Quote:

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Originally Posted by Declan1991

But did you take the line from the error console? It's obviously not complete with the ellipsis in the middle.

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Yes I did actually.

There seem to be no more conflict errors after trying and testing the methods described in Fang's link, but now the page isn't supposed to do what I originally intended it to do, which is have a javascript clickable image sidescroller, and the images themselves to pop-up in a lightbox. Now you can scroll through the images, but onClick the image just opens in a new browser window.

Could I be in over my head here?

The sidescroller is overwriting the lightbox event handler.
Perhaps another lightbox has both functions.