Create an interval to change image in jQuery?

Question

I have a working script like this:

jQuery(document).ready(function(){

    $('.video-thumb img').bind('mouseover',function(){
        var new = $(this).attr('src').replace(/default.jpg/,'1.jpg');
        $(this).attr('src',new);
    }).bind('mouseout',function(){
        var default = $(this).attr('src').replace(/[0-9].jpg/,'default.jpg');
        $(this).attr('src',default);
    });

});

Yeah, you guessed right. It's made to change YouTube's thumbnail on interval. However, I have no idea, how to create the interval. It now changes the thumbnail to 1.jpg, which is another thumbnail, but it should next change the image to 2.jpg in 1 second and so on.

The whole snippet should probably be written from scratch. Advice?

Hope you understood :-D

EDIT: I changed the variable-names from finnish words, I don't use them. Just in this example.

Martti Laine

Answer 1

new and default are reserved words in javascript. You cannot use them.

To create an interval you should use setInterval:

setInterval(function() {
  // do something
  // ...
}, 1000); // <- 1000ms = 1s

---

[See it in action]

jQuery(document).ready(function() {

    var timer, imgsrc, cnt = 0;

    $('.video-thumb img').bind('mouseover', function() {

      // if there is no timer
      if (!timer) {

        var $t = $(this);

        // get the image src
        imgsrc = $t.attr('src').replace('default.jpg','');

        // start a new timer
        timer = setInterval(function() {

          // periodically change the src
          $t.attr('src', imgsrc + (cnt+1) + ".jpg");

          // and adjust the counter
          cnt = ( cnt + 1 ) % 3; // 0, 1, 2

        }, 1000); // <- 1000ms = 1s
      }
    }).bind('mouseout',function() {

      // stop rotation
      if (timer) {
        clearInterval(timer);
        timer = null;
      }

      // set the default img
      $(this).attr('src', imgsrc + 'default.jpg');
    });
});