Fade out after div content has been shown using CSS

Question

I\'m trying to show a notification on button click. The button click actually checks for email validation. I know to show a div with content with the error message. However,

Answer 1

cross browser hack (instead of using css3 animation keyframes):

transition-timing-function: cubic-bezier(1,1,1.0,0);}
-webkit-transition-timing-function: cubic-bezier(1,1,1.0,0);

http://www.w3schools.com/cssref/css3_pr_transition-timing-function.asp