Phpjquery verification code

This tutorial mainly uses jquery ajax to implement advance verification of the jqueryphp verification code without refreshing the code. the instance code is as follows :? Php calls this page. if the following formula is set up, the verification code image is generated... this tutorial mainly uses jquery ajax to implement advance verification of the jquery php verification code without refreshing the code. The example code is as follows:

 
The verification code displayed on the static page is:
Verification code: 
  
The ajax verification code of jquery is as follows:
$.post("session.php",       {reg_code:$("#reg_code").val()},       function(data){       if(data === "1"){        //do...       }else{        do...      }     } );
The php page for ajax verification is called session. php. the code is as follows:
  
                     

 
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