change image opacity using javascript

Question

how can I change image opacity using javascript? I\'m going to create a fading effect using javascript, is there any sample? is there anything like image.opacity that can be

Answer 1

First set the opacity explicitly in your HTML thus:

otherwise it is 0 or null

this is then in my .js file

document.getElementById("fadeButton90").addEventListener("click", function(){
document.getElementById("box").style.opacity  =   document.getElementById("box").style.opacity*0.90; });