Untitled

<html>
	<head>
	<style type="text/css">
		input {
			height: 100px;
			vertical-align: middle;
		}

		#test_line {
			line-height: 100%;
			vertical-align: middle;
			background: red;
		}
	</style>
	</head>
	<body>
		<div id="test_line">
			This is a test
			<input type="text" value="test123" />
		</div>
	</body>
</html>