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JS implementation Send Verification Code Countdown button

Source: Internet
Author: User
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When writing the registration page, it is sometimes necessary to send a registration message to obtain the verification code, but in order to prevent repeated sending of the message,

You must make the button available again after a period of time.

The code is as follows:

1 <HTML> 2 <Head>3 <MetaCharSet= "Utf-8">4 <title>Verification Code Button</title> 5 </Head>6 <Body>7     <Buttontype= "button"ID= "Send">Send Verification Code</Button>8     <Scripttype= "Text/javascript">9 wait=  -;Ten         functionWait_time (btn) { One             if(Wait== 0) { A Btn.removeattribute ("Disabled"); - Btn.innertext= "Send Verification Code"; - wait=  -; the             } Else { - Btn.setattribute ("Disabled", true); - Btn.innertext=wait+"seconds after sending again"; - wait--; + SetTimeout (function() {wait_time (BTN);}, +); -             } +         } A document.getElementById ('Send'). onclick= function() {wait_time ( This)}; at     </Script> - </Body>  - </HTML>

JS implementation Send Verification Code Countdown button

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