# Stacking GIFs w/transparent backgrounds? **URL:** \ **Category:** Rails\ **Created:** [February 26, 2007, 8:21am UTC](https://www.ruby-forum.com/t/stacking-gifs-w-transparent-backgrounds/86826 "2007-02-26T08:21:56Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![iceburgh](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/i/c4cdca/32.png) [@iceburgh](https://www.ruby-forum.com/u/iceburgh)\ **Post date:** [February 26, 2007, 8:21am UTC](https://www.ruby-forum.com/t/stacking-gifs-w-transparent-backgrounds/86826/1 "2007-02-26T08:21:56Z")
I realize that this isn’t exactly a Rails question, but I _am_ planning to use the information for a Rails app :-). I’m interested in stacking GIFs w/transparent backgrounds, then using JavaScript to hide/show certain images. This will (it says here 🙂 let the user cause different parts of a diagram to appear and disappear. Problem is, I haven’t found a way to stack images so that this works. I’m using an opaque white image as the bottom image, then layering others (with transparent backgrounds) on top. If I set the opacity to (say) 0.5, I see all of the diagrams, with different amounts of haziness. Help? ## -r [http://www.cfcl.com/rdm](http://www.cfcl.com/rdm) Rich M. [http://www.cfcl.com/rdm/resume](http://www.cfcl.com/rdm/resume) removed\_email\_address@domain.invalid [http://www.cfcl.com/rdm/weblog](http://www.cfcl.com/rdm/weblog) +1 650-873-7841 Technical editing and writing, programming, and web development ---
**Author:** ![iceburgh](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/i/c4cdca/32.png) [@iceburgh](https://www.ruby-forum.com/u/iceburgh)\ **Post date:** [February 26, 2007, 9:06am UTC](https://www.ruby-forum.com/t/stacking-gifs-w-transparent-backgrounds/86826/2 "2007-02-26T09:06:59Z")
Never mind. Somehow, I didn’t have transparent backgrounds. ## -r [http://www.cfcl.com/rdm](http://www.cfcl.com/rdm) Rich M. [http://www.cfcl.com/rdm/resume](http://www.cfcl.com/rdm/resume) removed\_email\_address@domain.invalid [http://www.cfcl.com/rdm/weblog](http://www.cfcl.com/rdm/weblog) +1 650-873-7841 Technical editing and writing, programming, and web development ---
**Author:** ![iceburgh](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/i/c4cdca/32.png) [@iceburgh](https://www.ruby-forum.com/u/iceburgh)\ **Post date:** [February 26, 2007, 11:50am UTC](https://www.ruby-forum.com/t/stacking-gifs-w-transparent-backgrounds/86826/3 "2007-02-26T11:50:24Z")
In case anyone is interested, I hacked up some JavaScript to do dynamic composition of (Graphviz) diagrams: Diagram Composition [http://www.cfcl.com/rdm/diagrams/dc.html](http://www.cfcl.com/rdm/diagrams/dc.html) Dynamic Diagram Composition [http://www.cfcl.com/rdm/diagrams/ddc.html](http://www.cfcl.com/rdm/diagrams/ddc.html) ## -r [http://www.cfcl.com/rdm](http://www.cfcl.com/rdm) Rich M. [http://www.cfcl.com/rdm/resume](http://www.cfcl.com/rdm/resume) removed\_email\_address@domain.invalid [http://www.cfcl.com/rdm/weblog](http://www.cfcl.com/rdm/weblog) +1 650-873-7841 Technical editing and writing, programming, and web development ---
**Author:** ![iceburgh](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/i/c4cdca/32.png) [@iceburgh](https://www.ruby-forum.com/u/iceburgh)\ **Post date:** [February 26, 2007, 11:59am UTC](https://www.ruby-forum.com/t/stacking-gifs-w-transparent-backgrounds/86826/4 "2007-02-26T11:59:24Z")
I’m facing the same problem as you. I need to stack different images on each other dynamically when a user selects something from a list. How did you do it? Did you use css? ---
**Author:** ![iceburgh](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/i/c4cdca/32.png) [@iceburgh](https://www.ruby-forum.com/u/iceburgh)\ **Post date:** [February 26, 2007, 1:49pm UTC](https://www.ruby-forum.com/t/stacking-gifs-w-transparent-backgrounds/86826/5 "2007-02-26T13:49:39Z")
try this: [http://pastebin.ca/372959](http://pastebin.ca/372959) ---
**Author:** ![iceburgh](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/i/c4cdca/32.png) [@iceburgh](https://www.ruby-forum.com/u/iceburgh)\ **Post date:** [February 26, 2007, 5:05pm UTC](https://www.ruby-forum.com/t/stacking-gifs-w-transparent-backgrounds/86826/6 "2007-02-26T17:05:12Z")
At 2:58 AM -0800 2/26/07, Joram wrote: > I’m facing the same problem as you. I need to stack > different images on each other dynamically when a user > selects something from a list. > > How did you do it? Did you use css? CSS, HTML, and JavaScript - do a “View Source” > On 26 feb, 11:49, Rich M. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > > > In case anyone is interested, I hacked up some JavaScript > > to do dynamic composition of (Graphviz) diagrams: > > > > Diagram Composition > > [http://www.cfcl.com/rdm/diagrams/dc.html](http://www.cfcl.com/rdm/diagrams/dc.html) > > > > Dynamic Diagram Composition > > [http://www.cfcl.com/rdm/diagrams/ddc.html](http://www.cfcl.com/rdm/diagrams/ddc.html) ## -r [http://www.cfcl.com/rdm](http://www.cfcl.com/rdm) Rich M. [http://www.cfcl.com/rdm/resume](http://www.cfcl.com/rdm/resume) removed\_email\_address@domain.invalid [http://www.cfcl.com/rdm/weblog](http://www.cfcl.com/rdm/weblog) +1 650-873-7841 Technical editing and writing, programming, and web development