jQuery Ajax displays right and wrong numbers to verify whether the input verification code is correct

This article mainly introduces jQuery Ajax to display correct and incorrect numbers to verify whether the input verification code is correct. Friends who are interested in ajax can refer to this article!

Without further ado, I will post the code directly for you. The specific code is as follows:

<script src="js/j.js"></script>
<script>
$(document).ready(function(e) {
 $(&#39;#yes&#39;).hide();
 $(&#39;#no&#39;).hide();
  $(&#39;input[name=gcode]&#39;).keyup(function(){
   if($(this).val().length==4){
  $.post(&#39;gbook.php&#39;,{cc:$(&#39;input[name=gcode]&#39;).val()},function(msg){
   
   if(msg==&#39;yes&#39;){
    $(&#39;#no&#39;).hide();
    $(&#39;#yes&#39;).show();
   }else{
    $(&#39;#yes&#39;).hide();
    $("#no").show();
   }
  });
  }
 });
});
</script>

## First introduce the html code of 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;
}

verification code

<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=&#39;inc/cc.php?&#39;+new Date" title="点击换一张图片" width="100px"></td>
 </tr>

gbook.php

<?php
session_start();
if(isset($_POST[&#39;cc&#39;])){
 $cc = strtolower($_POST[&#39;cc&#39;]);
 $ss = strtolower($_SESSION[&#39;code&#39;]);
 if($cc==$ss){
   echo "yes";
 }else{
   echo "no"; 
 }
}

##Note that pictures must be imported

The above is the jQuery Ajax introduced by the editor to display correct and incorrect numbers to verify whether the input verification code is correct. I hope it will be helpful to everyone! !

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