.button {
	padding: 5px 10px;
	background: #2664cf;
	font-family: Arial, sans-serif;
	color: #ffffff;
	text-align: center;
	display: block;
	cursor: pointer
	}
.button {
	border: 1px solid #4cadfc;
	border-radius: 4px;
	-webkit-border-radius: 4px;
	-moz-border-radius: 4px
	}
.button {
	background: -webkit-gradient(linear, left top, left bottom, from(#0a8ffe), to(#2b5cc6));
	background: -moz-linear-gradient(top, #0a8ffe, #2b5cc6);
	filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#0a8ffe', endColorstr='#2b5cc6')
	}



<input type="submit" value="Submit" class="button" />

Jacked from Google

CSS: Input Button With Rounded Corners & Gradient Background

CSS