vCode Required. Variant that specifies a function pointer or string that indicates the code to be executed when the specified interval has elapsed.
iMilliSeconds Required. Integer that specifies the number of milliseconds.
sLanguage Optional. String that specifies any one of the possible values for the LANGUAGE attribute.
Return Value
Integer. Returns an identifier that cancels the timer with the clearInterval method.
Remarks
The setInterval method continuously evaluates the specified expression until the timer is removed with the clearInterval method.
In versions earlier than Microsoft? Internet Explorer 5, the first argument of setInterval must be a string. Evaluation of the string is deferred until the specified interval elapses.
As of Internet Explorer 5, the first argument of setInterval can be passed as a string or as a function pointer.
To pass a function as a string, be sure to suffix the function name with parentheses.
window.setInterval("someFunction()", 5000);
When passing a function pointer, do not include the parentheses.
window.setInterval(someFunction, 5000);
To retrieve a function pointer, use the code shown in the following example:
function callback()
{
alert("callback");
}
function callback2()
{
alert("callback2");
}
function chooseCallback(iChoice)
{
switch (iChoice)
{
case 0:
return callback;
case 1:
return callback2;
default:
return"";
}
}
// if i is 0, callback is invoked after 5 seconds
// if i is 1, callback2 is invoked
// otherwise, the timer is not set
window.setInterval(chooseCallback(i), 5000);
When you use the setInterval method with Introduction to DHTML Behaviors, the value of vCode should be a function pointer to call a function within the HTML Component (HTC) file or a string to call a functionin the primary document.
Example
This example uses the setInterval method to create a Dynamic HTML (DHTML) clock. A variable is assigned to the interval, and can be used as a reference to stop the interval using the clearInterval method.
