javascript - Repeat code every 4 seconds

Question

I want repeat this code every 4 seconds, how i can do it with javascript or jquery easly ? Thanks. :)

$.get("request2.php", function(vystup){
   if (vystup !== ""){
      $("#prompt").html(vystup);
      $("#prompt").animate({"top": "+=25px"}, 500).delay(2000).animate({"top": "-=25px"}, 500).delay(500).html("");
    }
});

Answer 1

Use setInterval function

setInterval( fn , miliseconds )

From MDC docs:

Summary

Calls a function repeatedly, with a fixed time delay between each call to that function.

Syntax

var intervalID = window.setInterval(func, delay[, param1, param2, ...]);
var intervalID = window.setInterval(code, delay);

where

intervalID is a unique interval ID you can pass to clearInterval().

func is the function you want to be called repeatedly.

code in the alternate syntax, is a string of code you want to be executed repeatedly. (Using this syntax is not recommended for the same reasons as using eval())

delay is the number of milliseconds (thousandths of a second) that the setInterval() function should wait before each call to func. As with setTimeout, there is a minimum delay enforced.

Note that passing additional parameters to the function in the first syntax does not work in Internet Explorer.

Example

// alerts "Hey" every second
setInterval(function() { alert("Hey"); }, 1000);