input输入框内禁止输入空格

<!doctype html> <html lang="en"> <head> <meta charset="UTF-8"> <title>禁止输入空格键</title> <script src="http://libs.baidu.com/jquery/...

<!doctype html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>禁止输入空格键</title>
  <script src="http://libs.baidu.com/jquery/1.11.3/jquery.min.js"></script>
</head>
<body>
  <input type="text" />
</body>
<script>
  $('input').keydown(function(e) {
      if (e.keyCode == 32) {
          return false;
      }
  });
</script>
</html>