- <input type="text" placeholder="请输入您的用户名...">
- <script type="text/javascript">
- $("input[name='username']").bind('input',
- function() {
- var pattern = new RegExp("[^a-zA-z1-9]");
- var rs = '';
- var str = $(this).val();
- for (var i = 0; i <str.length; ++i) {
- rs = rs + str.substr(i, 1).replace(pattern, '');
- }
- $(this).val(rs);
- });
- </script>
来源: http://www.bubuko.com/infodetail-2253499.html