#product_button {
  background-color: #000000;
  -webkit-border-radius: 3px;
  border-radius: 1px;
  border: none;
  color: #555555;
  cursor: pointer;
  display: inline-block;
  font-family: Arial;
  font-size: 14px;
  padding: 3px 8px;
  text-align: center;
  text-decoration: none;
}

@-webkit-keyframes glowing {
  0% { background-color: #FF9900; -webkit-box-shadow: 0 0 3px #FF9900; }
  50% { background-color: #FFD966; -webkit-box-shadow: 0 0 10px #FFD966; }
  100% { background-color: #FF9900; -webkit-box-shadow: 0 0 3px #FF9900; }
}

@-moz-keyframes glowing {
  0% { background-color: #FF9900; -moz-box-shadow: 0 0 3px #FF9900; }
  50% { background-color: #FFD966; -moz-box-shadow: 0 0 10px #FFD966; }
  100% { background-color: #FF9900; -moz-box-shadow: 0 0 3px #FF9900; }
}

@-o-keyframes glowing {
  0% { background-color: #FF9900; box-shadow: 0 0 3px #FF9900; }
  50% { background-color: #FFD966; box-shadow: 0 0 10px #FFD966; }
  100% { background-color: #FF9900; box-shadow: 0 0 3px #FF9900; }
}

@keyframes glowing {
  0% { background-color: #FF9900; box-shadow: 0 0 3px #FF9900; }
  50% { background-color: #FFD966; box-shadow: 0 0 10px #FFD966; }
  100% { background-color: #FF9900; box-shadow: 0 0 3px #FF9900; }
}

#product_button {
  -webkit-animation: glowing 1500ms infinite;
  -moz-animation: glowing 1500ms infinite;
  -o-animation: glowing 1500ms infinite;
  animation: glowing 1500ms infinite;
}