javascript

Pure js realizes the reciprocal function of the button of the retest verification code

Code 1:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title> Headless document </title>
<script type="text/javascript" src="js/jquery.js"></script>
</head>

<body>
<input type="button" id="btn" value=" Get the captcha for free " onclick="settime(this)" />
<script type="text/javascript">
var countdown=60;
function settime(val) {
if (countdown == 0) {
val.removeAttribute("disabled");
val.value=" Get the captcha for free ";
countdown = 60;
} else {
val.setAttribute("disabled", true);
val.value=" To resend (" + countdown + ")";
countdown--;
}
setTimeout(function() {
settime(val)
},1000)
}
</script>
</body>
</html>

Code 2:

When you register, you need to send an email to verify and activate the account. In order to avoid repeated sending of the email, you can set button for 1 period of time after you click send. Here’s a simple example:

<html>
<head>
<title> Click the button to get the captcha and the button will turn grey 1 After a period of time can be repeated click </title>
</head>
<body>
<input type="button" id="btn" value=" Get the captcha for free " />
<script type="text/javascript">
var wait=60;
function time(o) {
    if (wait == 0) {
      o.removeAttribute("disabled");
      o.value=" Get the captcha for free ";
      wait = 60;
    } else {
      o.setAttribute("disabled", true);
      o.value=wait+" You can resend it in seconds ";
      wait--;
      setTimeout(function() {
        time(o)
      },
      1000)
    }
  }
document.getElementById("btn").onclick=function(){time(this);}
</script>
</body>
</html>