jQuery Ajax显示对号和错号用于验证输入验证码是否正确

<script src="/UploadFiles/2021-04-02/j.js">

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="/UploadFiles/2021-04-02/cc.php">

gbook.php


<"yes";
 }else{
   echo "no"; 
 }
}


注意图片一定要引入

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