【text_input】
<!DOCTYPE html>
<html>
<head>
<script type='text/javascript'
src='http://code.jquery.com/jquery-git.js'></script>
<style type='text/css'>
.courier {
background-color: red;
color: #ccc;
}
</style>
<script type='text/javascript'>
$(function(){
$('input[type=text]').addClass('courier');
});
</script>
</head>
<body>
<form>
<input type="text" id="text" />
<input type="button" id="button" value='OK' />
</form>
</body>
</html>
