js限制输入框字数

来源：互联网发布：装修预算软件下载编辑：程序博客网时间：2024/05/17 06:36

<!doctype html><html><head><meta charset="utf-8"><title></title></head><body><input type="text" name="" id="" maxlength="6" onkeyup="checkInputCount(this, 6);" /><span>0/6</span><script type="text/javascript">function checkInputCount(elem, count){    elem.value = elem.value.substring(0, elem.maxlength);    elem.nextSibling.innerHTML = elem.value.length + '/' + count;}</script></body></html>

<!doctype html><html><head><meta charset="utf-8"><title>无标题文档</title></head><body><input type="text" maxlength="6" xid="textContent" ><span><em>0</em>/6</span><script src="http://code.jquery.com/jquery-1.10.2.min.js"></script><script>$(function(){    $('[xid="textContent"]').keyup(function(){        $(this).next('span').children('em').html($(this).val().length);    });/*    $('[xid="textContent"]').blur(function(){        alert($(this).val())    });*/});</script></body></html>

原文地址：

http://write.blog.csdn.net/postedit