animated background button

.twitter_login-button {
	cursor: pointer;
	background-color: #89cdd1;
	background: -moz-linear-gradient(top, #bbe2e5 0%,#89cdd1 3%, #46b1b7 100%);
    background: -webkit-gradient(linear,left top,left bottom,color-stop(0, #bbe2e5),color-stop(0.03, #89cdd1),color-stop(1, #46b1b7));
    filter:  progid:DXImageTransform.Microsoft.gradient(startColorStr='#89cdd1', EndColorStr='#46b1b7');
    -ms-filter: "progid:DXImageTransform.Microsoft.gradient(startColorStr='#89cdd1', EndColorStr='#46b1b7')";
    -khtml-border-radius: 35px;
	-moz-border-radius: 35px;
	-webkit-border-radius: 35px;
	border-radius: 35px;
	border: 1px solid #379ea4;
	display: block;
	float: right;
	font-size: 16px;
	color: #fff;
	font-weight: normal;
	text-shadow: #12656a 0px 1px;
	text-align: center;
	padding: 6px 40px 8px;
	margin: 10px 0 10px;
	-webkit-animation-name: glowPulse;
	-webkit-animation-duration: 2s;
	-webkit-animation-iteration-count: infinite;
}
 
.twitter_login-button:hover {
	border: 1px solid #54cdd4;
	background: -moz-linear-gradient(top, #bfecef 0%,#91dfe3 3%, #54cdd4 100%);
    background: -webkit-gradient(linear,left top,left bottom,color-stop(0, #bfecef),color-stop(0.03, #91dfe3),color-stop(1, #54cdd4));
    filter:  progid:DXImageTransform.Microsoft.gradient(startColorStr='#91dfe3', EndColorStr='#54cdd4');
    -ms-filter: "progid:DXImageTransform.Microsoft.gradient(startColorStr='#91dfe3', EndColorStr='#54cdd4')";
}
 
.twitter_login-button:active {
	border: 1px solid #54cdd4;
	background: -moz-linear-gradient(top, #49b9bf 0%, #51cbd2 100%);
    background: -webkit-gradient(linear,left top,left bottom,color-stop(0, #49b9bf),color-stop(1, #51cbd2));
    filter:  progid:DXImageTransform.Microsoft.gradient(startColorStr='#49b9bf', EndColorStr='#54cdd4');
    -ms-filter: "progid:DXImageTransform.Microsoft.gradient(startColorStr='#49b9bf', EndColorStr='#51cbd2')";
}