Change background on if statement

I want to change the background of a specific element, this is the code i have:

.overlay .playWrapper {
  opacity: 0;
  position: absolute; z-index: 1;
  top: 0;
  width: 193px; height: 193px;
    background: rgba(0,0,0,0.6) url("myimg") no-repeat scroll center center / 60px 60px;

but because i have 2 class elements when i use document.getElementByClass it doesn’t work and i need it to me inside a function, since i want the background to deppend on the condition. Anyone can help with this?

• This topic was modified 4 years, 5 months ago by Jan Dembowski.