How to refresh or partially refresh the .net CAPTCHA

This article mainly shows you "how to achieve .net CAPTCHA refresh or local refresh", the content is easy to understand, clear, hope to help you solve your doubts, the following let Xiaobian lead you to study and learn "how to achieve .net CAPTCHA refresh or local refresh" this article.

The code is as follows:

Verification code:

Method 1: use the pseudo-class implementation of JavaScrip

The copy code is as follows:

Method 2: introduce external files

Introduce external files between html files

The copy code is as follows:

/ / external file code.js sets local refresh function

Function code () {

Var code = document.getElementByIdx_x_x ('code')

Var update = document.getElementByIdx_x_x ('update')

Update.onclick = function () {

Code.src='code.php?tm='+Math.random ()

}

}

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