方法一，超出字符之后就不能再输入了。<br><br>方法二，超出字符后将会弹出提示。<br><script language="javascript" type="text/javascript"><br>function chkmaxsms(vobj1,vmax) { <br> var str=vobj1.value; <br> var strlen=str.length; <br> <br> if(strlen>vmax) { <br> alert('字数超过限制'); <br> eval_r(vobj1.value=str.substr(0,vmax)); <br> } <br> } <br></script><br><textarea name="textfield" onkeyup="javascript:chkmaxsms(this,'10')"></p> </div> </div> <div class="clear"></div> </div> <div class="wdhdnr"> <div class="huidanrtop"> <div class="wdhuidaxinx"> <div class="wdhuidaxm">回答2：</div> </div> </div> <div class="clear"></div> <div class="wdhuidanrmid"> <div class="zuijiacont"> <p>在TextChanged事件里 一直判断字符串的长度 如果长了 就自动截取……出来的效果就是不能超过长度了……<br>至于提示……也写在这个事件里也可以 但是有一个不是问题的问题 如果不是输入数字英文 要输入中文的话<br>用输入法输入内容 一次输的可能远超过你的限制 那么这个提示会一直报 因为虽然输入很多 他也是一个一个录入的……造成了提示信息不断的问题……自己把握吧<br><br>希望我团的答案能给您一定的帮助~祝您早日解决问题~！</p> </div> </div> <div class="clear"></div> </div> </div> </div> <div class="wendaright"> <div class="wdluluerwema"> <div class="wdxgwttop">相关问答</div> <div class="wdxgwtnr"> </div> <div class="clear"></div> </div> <!-- 其他随机问答['id'=>alphaID($like['zid'])] --> <div class="wdluluerwema"> <div class="wdxgwttop">最新问答</div> <div class="wdxgwtnr"> <div class="wdxgwtcont"> <div class="wdxgtitle"><a href="https://www.191i.com/index.php/1797378460978946027.html">刘顾明老师和张银合老师哪个临床讲的好？刘顾明老师是中域医考的独家讲师吗</a></div> </div> <div class="wdxgwtcont"> <div class="wdxgtitle"><a href="https://www.191i.com/index.php/1709161220470815380.html">贵州织金黔州石材开发有限公司怎么样？</a></div> </div> <div class="wdxgwtcont"> <div class="wdxgtitle"><a href="https://www.191i.com/index.php/1110361804707276579.html">我手机是三星7100，有个带盖的手机壳，怎么设置才能让盖子盖上以后自动关屏？</a></div> </div> <div class="wdxgwtcont"> <div class="wdxgtitle"><a href="https://www.191i.com/index.php/298023726.html">同志们！！！WIN7到底能不能玩使命召唤4和6说清楚点，绝对给分</a></div> </div> <div class="wdxgwtcont"> <div class="wdxgtitle"><a href="https://www.191i.com/index.php/566549241428731964.html">府谷县众鑫有限责任公司怎么样？</a></div> </div> <div class="wdxgwtcont"> <div class="wdxgtitle"><a href="https://www.191i.com/index.php/1964616864967710860.html">为什么只有15k一30k⼀月的才有资格和权利上脉脉招聘？是怨城，城怨修改城市职场脚度角度么？</a></div> </div> <div class="wdxgwtcont"> <div class="wdxgtitle"><a href="https://www.191i.com/index.php/175815195523876604.html">繁昌人能在芜湖办理港澳通行证吗?</a></div> </div> <div class="wdxgwtcont"> <div class="wdxgtitle"><a href="https://www.191i.com/index.php/1735502257158791667.html">九天仙女下凡尘，写一首诗</a></div> </div> <div class="wdxgwtcont"> <div class="wdxgtitle"><a href="https://www.191i.com/index.php/1500414754956932659.html">周围有没有手机维修店</a></div> </div> <div class="wdxgwtcont"> <div class="wdxgtitle"><a href="https://www.191i.com/index.php/1052814828098610819.html">求律师告知什么是打架造成刑事责任附带民</a></div> </div> </div> </div> </div> <div class="clear"></div> <div class="footer"> <!-- 移动底部导航 --> <div class="fanhuitop"><a href="#top" ref="nofollow"><img src="https://www.191i.com/static/old/img/fhtop.png" title="返回顶部"></a></div> <div class="dibu"> <div class="dibu"> </div> </div> <div class="banquan"> <p>内容全部来源于网络收集，如有侵权，请联系网站删除：QQ：24596024</p> </div> </div> </div> </div> <script> var _hmt = _hmt || []; (function() { var hm = document.createElement("script"); hm.src = "https://hm.baidu.com/hm.js?530214f19d678452e8fa4098a936ce38"; var s = document.getElementsByTagName("script")[0]; s.parentNode.insertBefore(hm, s); })(); </script> </body> </html>
