Disabling onclick attribute with javascript

Question

How do I disable the other onclick event once one of them has been activated. Both divs are set to display:none; in the CSS. This is probably really simple but I am new to p

Answer 1

Like this for example:

function showDiv(id){   

  if  (id == "leftbutton"){
  document.getElementById('orangediv').style.display = 'block';
  document.getElementById('rightbutton').onclick = "#";
}else{
  document.getElementById('greendiv').style.display = 'block';
  document.getElementById('leftbutton').onclick = "#";
}}