refer5,
<html>
<head>
<title>Mobile hide block</title>
<script type="text/javascript" src="http://slowlight.ru/js/is.mobile.js"></script>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js"></script>
<script>
$(document).ready(function(){
if (!is_mobile()) $(".chang").removeClass("hide0");
});
</script>
<style>
.hide0{ display: none }
</style>
</head>
<body>
<div class="chang hide0">Hi World! </div>
</body>
</html>