This error occurs when trying bind an event, using window.attachEvent as a function, which only works in Internet Explorer.
Your code might look something like this:
var myFunction = function(){
alert("foo");
}
window.attachEvent("onclick", myFunction);
To fix this, use the following code (remember to remove “on” from “onclick” etc):
var myFunction = function(){
alert("foo");
}
window.addEventListener("click", myFunction);