jQuery图像src每8秒更改一次

Question

I have a div with the ID of header, what id like is the first image found in this id to change every 8 seconds. The image name is image1.jpg and after 8 seconds id like it to change image1 to image2 then after another 8 seconds revert back to image1 and so forth.

Is the route of finding the first image in the div etc a bit long winded and how would i go about the rest? For instance getting the src to change every 8 seconds? Help much appreciated

Answer 1

You can try

var $img = $('div#header img').first();
var flag = false;
setInterval(function(){
    $img.attr('src', 'image' + (flag ? 1 : 2) + '.jpeg' );
    flag = !flag;
}, 8000);

Functional Demo: Fiddle (Note: This does not work with image, but just a demo for the technique used. Check the console to see the src value)

Answer 2

assuming the first image is image1.jpeg then at the first run you what it to be 2 so use ++i to increment first then use the var in the string

var i = 0;
setInterval(function() { 
     if(i == 2) i=0;

     $('#imageID').attr('src', 'image' + (++i) + '.jpeg' );
}, 8000);