jQuery: Temporarily change a style then reset to original class

Question

Say I have a class named testThing:

.testThing
{
   background-color:#000000;
   float:left;
   height:50px;
   width:50px;
}

And I want to

Answer 1

What about toggleClass("testThing")? I use it when there's more than one property to change.

http://api.jquery.com/toggleClass/