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JavaScript click on Button Countdown example

Source: Internet
Author: User
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HTML code:

The code is as follows Copy Code

<input type= "button" id= "btn" value= "Free access to authentication code"/>

JS Code:

The code is as follows Copy Code
<script type= "Text/javascript" >
var wait=60;
function Time (o) {
if (wait = = 0) {
O.removeattribute ("Disabled");
O.value= "Free access to verification code";
wait = 60;
} else {
O.setattribute ("Disabled", true);
O.value= "Resend (" + Wait + ")";
wait--;
settimeout (function () {
Time (O)
},
1000)
}
}
document.getElementById ("Btn"). Onclick=function () {time (this);}
</script>

The effect chart is as follows

Example

The code is as follows Copy Code

/**
* Countdown function
* Need to bind the button to the Click event
* such as: <input contenteditable=false value= send sms Type=button data-cke-pa-onclick= "setinterval (' CountDown"), 1000); "data-cke-editable=" 1 ">
* 30 represents the number of seconds, the number of seconds to be counted can be changed
*/
function Countdown (Obj,second) {
If the number of seconds is still greater than 0, it means the countdown is not over yet.
if (second>=0) {
Get the text on the default button
if (typeof buttondefaultvalue = = ' undefined ') {
Buttondefaultvalue = Obj.defaultvalue;
}
button to non-clickable state
Obj.disabled = true;
The contents of the button render the countdown status
Obj.value = Buttondefaultvalue+ ' (' +second+ ') ';
Time Minus One
second--;
Repeat execution after one second
settimeout (function () {countdown (Obj,second);},1000);
Otherwise, the button resets to the initial state
}else{
button not to click state
obj.disabled = false;
The content in the button is restored to its original state
Obj.value = Buttondefaultvalue;
}
}

HTML code

The code is as follows Copy Code
JS button 30 seconds Countdown effect <p>
<input onclick= "Countdown (this,30);" type= "button" value= "Send SMS"/></p>
June-Tai Blog www.111cn.net<p>

In the button-bound JS Click event &lsquo;30&rsquo; represents the countdown seconds, you can set the number of seconds in the binding, flexible application. Of course, this countdown is just a front-end control, if the need for a more secure approach should be the server side also make judgments. </p>

Example, this example is based on jquery.

  code is as follows copy code

<title>test count down button</title>
<script src= "/js/jquery.js" Text/javascript "></script>
<script type=" Text/javascript ">
$ (function () {
$ (' #btn '). Click (function () {
var count = 3;
var countdown = SetInterval (countdown, 1000);

Function countdown () {
$ ("#btn"). attr ("Disabled", true);
$ ("#btn"). Val ("Please wait" + count + "seconds!");
if (count = = 0) {
$ ("#btn"). Val ("Submit"). Removeattr ("Disabled");
Clearinterval (Countdown);
}
count--;
}
})
});
</script>
<body>
<input type= "button" id= "btn" value= "Submit"/>
</body>

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