Device no scale and mediaquery example
<!doctype html>
<html>
<head>
<meta name="viewport" content="width=device-width, maximum-scale=1.0, minimum-scale=1.0, initial-scale=1.0" />
<!-- media query example -->
<link rel="stylesheet" type="text/css" media="only screen and (max-width:950px)" href="css/screen_layout_medium.css" />
</head>
</html>