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

Another possibility is to use setTimeout, but place it along with your code in a function that gets called recursively in the callback to the $.get() request.

This will ensure that the requests are a minimum of 4 seconds apart since the next request will not begin until the previous response was received.

 // v--------place your code in a function
function get_request() {
    $.get("request2.php", function(vystup){
       if (vystup !== ""){
          $("#prompt").html(vystup)
                      .animate({"top": "+=25px"}, 500)
                      .delay(2000)
                      .animate({"top": "-=25px"}, 500)
                      .delay(500)
                      .html("");
        }
        setTimeout( get_request, 4000 ); // <-- when you ge a response, call it
                                         //        again after a 4 second delay
    });
}

get_request();  // <-- start it off