How to rotate an image 180 degrees on every click with css?

Dear Experts,

I'm using jquery mobile to do an app, and I'm using an image to toggle the footer of my app.
The thing is that I need to animate with a rotate the image (that is a chevron arrow pointing to the top) and I want that when the user makes a tap on the image, the image will rotate 180 degrees.

My app is here: Symbiont Technologies

1. Sign In
2. Click on the blue image that has the numbers 1234.
Footerproblemscreenshots.png3. Then you click on the chevron image that is on the bottom right of the page.
That chevron image toggles the footer, but the image is static.
There's where I want to rotate that image with css on every click of the user.

Thanks in Advance.

Best Regards.
Conrado ZAVALAAsked:
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Kyle HamiltonData ScientistCommented:
instead of hiding and showing different images, toggle a class on click.

add a transition to #imgFooter rule:

#imgFooter {
height: 40px;
width: 40px;
position: fixed;
bottom: 30px;
right: 5px;
opacity: 0.90;
filter: alpha(opacity=90);
z-index: 20;
-webkit-transition: all 1s;
-moz-transition: all 1s;
-ms-transition: all 1s;
transition: all 1s;

Open in new window

make a new class:

-webkit-transform: rotate(180deg);
-moz-transform: rotate(180deg);
-ms-transform: rotate(180deg);
transform: rotate(180deg);

Open in new window

toggle the arrowUp class on click.

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Kyle HamiltonData ScientistCommented:
btw, get rid of the filter. there are no phones with old IE.
Conrado ZAVALAAuthor Commented:
Hi Kyle, I've made the changes you invite me to do, but now I'm coming with this new problem.

It is in the same URL.

1. Sign In
2. Click on the blue image that has the 3 little men.
Footernewproblem.png--* You click on the chevron image and it works pretty nice, but when you go to the other page it stops making the rotate.
3. click on the next page.
Footernewproblem2.png--* When you click on the chevron it doesn't work.

Do you know what's happening?

Thank you for your help.

Best Regards.
Conrado ZAVALAAuthor Commented:
I already fix the problem Kyle. Thank you very much for your help.

Best Regards.
Kyle HamiltonData ScientistCommented:
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