music play on load page in javascript

Question

I have the following code in javascript that plays a sound

function muzplay() {
   var muz = document.getElementById("song");
   var button = document.getElementById("play");

   if (muz.paused) {
      muz.play();
      button.textContent = "||";
   } else {
      muz.pause();
      button.textContent = ">";
   }
}

but it doesn't starts when the page is loading for the first time. How can I make the song start when the page is loading?

If I would like to add an image as a button, instead of "button.textContent = "||";" what command can I use. for example I want to use a customize play and pause button instead of the || and > text.

Answer 1

window.onload = function(){ muzplay();}
// or
window.document.onload = function(){ muzplay();}
// or
muzplay();