【text_input】
<!DOCTYPE html>
<html>
<head>
<script type='text/javascript'
src='http://code.jquery.com/jquery-1.6.2.js'></script>
<script type='text/javascript'>
$(window).load(function(){
$(function(){
$("textarea").keyup(function(){
$("div").html($(this).val());
});
});
});
</script>
</head>
<body>
<textarea></textarea>
<br />
<div></div>
</body>
</html>
