Why wont my disabled button be effected by my function?

Question

<input type="submit" value="Submit" id="vidEnds" class="btn btn-primary" disabled="disabled" />

var button = document.getElementById("vidEnds")
player.addEventListner("onStateChange", function(state){
if (state === 0) {
button.disabled = false;
}
});

Answer 1

player.addEventListener

A typo on that line.