.flash-button{
background:green;
padding:5px 10px;
color:#fff;
border:none;
border-radius:5px;

border: #00ffff;
border-style: solid;
border-width: 2px;

animation-name: flash;
animation-duration: 2s;
animation-timing-function: linear;
animation-iteration-count: infinite;

//Firefox 1+
-webkit-animation-name: flash;
-webkit-animation-duration: 2s;
-webkit-animation-timing-function: linear;
-webkit-animation-iteration-count: infinite;

//Safari 3-4
-moz-animation-name: flash;
-moz-animation-duration: 2s;
-moz-animation-timing-function: linear;
-moz-animation-iteration-count: infinite;
}

@keyframes flash {
0% { opacity: 1.0; }
50% { opacity: 0.5; }
100% { opacity: 1.0; }
}

//Firefox 1+
@-webkit-keyframes flash {
0% { opacity: 1.0; }
50% { opacity: 0.5; }
100% { opacity: 1.0; }
}

//Safari 3-4
@-moz-keyframes flash {
0% { opacity: 1.0; }
50% { opacity: 0.5; }
100% { opacity: 1.0; }
}