Image rotation effect implementation code (click the button to stop execution)_javascript skills

In this small program, you need to set the naming of the pictures in the images folder to be in order, 1, 2, 3...

Copy code The code is as follows:

var imgnumb = 1;
function imgfor() {
imgnumb ;
document.getElementById('img1').setAttribute('src', 'images/' imgnumb '.jpg');
if (imgnumb == 5) {
imgnumb = 0;
}
}
var clearid;
function clearfun() {
clearInterval(clearid);
}
clearid=setInterval(imgfor, 500);