JS & DOM Reference
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Window setInterval() Method
Window Object
Definition and Usage
The setInterval() method calls a function or evaluates an expression at specified intervals (in milliseconds).
The setInterval() method will continue calling the function until clearInterval() is called, or the window is closed.
The ID value returned by setInterval() is used as the parameter for the clearInterval() method.
Tip: 1000 ms = 1 second.
Syntax
setInterval(code,millisec,lang)
| Parameter | Description |
|---|---|
| code | Required. A reference to the function or the code to be executed |
| millisec | Required. The intervals (in milliseconds) on how often to execute the code |
| lang | Optional. JScript | VBScript | JavaScript |
Browser Support
The setInterval() method is supported in all major browsers.
Example
Example
Call the clock() function every 1000 millisecond. The clock() function updates the clock. The example also have a button to stop the clock:
<html>
<body>
<input type="text" id="clock" />
<script language=javascript>
var int=self.setInterval("clock()",1000);
function clock()
{
var d=new Date();
var t=d.toLocaleTimeString();
document.getElementById("clock").value=t;
}
</script>
<button onclick="int=window.clearInterval(int)">Stop</button>
</body>
</html>
<body>
<input type="text" id="clock" />
<script language=javascript>
var int=self.setInterval("clock()",1000);
function clock()
{
var d=new Date();
var t=d.toLocaleTimeString();
document.getElementById("clock").value=t;
}
</script>
<button onclick="int=window.clearInterval(int)">Stop</button>
</body>
</html>
Try it yourself »
Window Object
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Tutorials, references, and examples are constantly reviewed to avoid errors, but we cannot warrant full correctness of all content.
While using this site, you agree to have read and accepted our terms of use and privacy policy.
Copyright 1999-2012 by Refsnes Data. All Rights Reserved.
Tutorials, references, and examples are constantly reviewed to avoid errors, but we cannot warrant full correctness of all content.
While using this site, you agree to have read and accepted our terms of use and privacy policy.
Copyright 1999-2012 by Refsnes Data. All Rights Reserved.