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Introduction and Application of js setTimeout () functions take countdown As An Example
The setTimeout () method is used to call a function or expression after a specified number of milliseconds. The following is an example of countdown.
Definition and usage:
The setTimeout () method is used to call a function or computing expression after a specified number of milliseconds.
Syntax:
SetTimeout (code, millisec)
Parameters:
Code (required): the JavaScript code string to be executed after the function to be called.
Millisec (required): The number of milliseconds to wait before executing the code.
Tip:
SetTimeout () is executed only once. If you want to call it multiple times, use setInterval () or let the code itself call setTimeout () again ().
Example:
The Code is as follows:
<Script language = "javascript">
Function timer (){
Var value = Number (document. all ['time']. value );
If (value> 1) document. all ['time']. value = value-1;
Else {
Document. all ['time']. value = "agree ";
Return false;
}
Window. setTimeout ("timer ()", 1000 );
}
</Script>
<Body onload = "timer ()">
<Input name = "time" value = "10" type = "button" style = "width: 40px;"/>
</Body>
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