废话不多说了，直接给大家贴代码了，具体代码如下所示：

<script src="js/j.js"></script><script>$(document).ready(function(e) { $('#yes').hide(); $('#no').hide(); $('input[name=gcode]').keyup(function(){ if($(this).val().length==4){ $.post('gbook.php',{cc:$('input[name=gcode]').val()},function(msg){ if(msg=='yes'){ $('#no').hide(); $('#yes').show(); }else{ $('#yes').hide(); $("#no").show(); } }); } });});</script>

首先引入jquery

.sl-error-verifycode { background-image: url("images/icons.png"); background-position: -26px 0; background-repeat: no-repeat; display: block; font-size: 18px; height: 23px; line-height: 20px; margin-left: 180px; margin-top: -25px; position: relative; text-align: center; width: 20px; z-index: 2;}.sl-correct-verifycode { background-image: url("images/icons.png"); background-position: -50px 0; background-repeat: no-repeat; display: block; font-size: 18px; height: 23px; line-height: 20px; margin-left: 180px; margin-top: -25px; position: relative; text-align: center; width: 20px; z-index: 2;}

验证码的html 代码

<tr> <td height="40" align="right">验证码：</td> <td height="40"><span class="addred">*</span></td> <td height="40"> <input type="text" name="gcode" id="textfield7" class="txtlist"><span id="yes" class="sl-correct-verifycode"></span><span id="no" class="sl-error-verifycode"></span> <img style="float:right; margin-top:-25px; margin-right:300px;" align="middle" src="inc/cc.php" onClick="this.src='inc/cc.php?'+new Date" title="点击换一张图片" width="100px"></td> </tr>

gbook.php

<?phpsession_start();if(isset($_POST['cc'])){ $cc = strtolower($_POST['cc']); $ss = strtolower($_SESSION['code']); if($cc==$ss){ echo "yes"; }else{ echo "no"; }}

注意图片一定要引入

以上所述是小编给大家介绍的jQuery Ajax显示对号和错号用于验证输入验证码是否正确，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对网站的支持！