Cross-Browser Enable or Disable MouseScroll Temporanly

Cross-Browser Enable or Disable MouseScroll Temporanly

// left: 37, up: 38, right: 39, down: 40,
// spacebar: 32, pageup: 33, pagedown: 34, end: 35, home: 36
var keys = [37, 38, 39, 40];

function preventDefault(e) {
	e = e || window.event;
	if (e.preventDefault)
		e.preventDefault();
	e.returnValue = false;  
}

function keydown(e) {
	for (var i = keys.length; i--;) {
		if (e.keyCode === keys[i]) {
			preventDefault(e);
			return;
		}
	}
}

function wheel(e) {
	preventDefault(e);
}

function disable_scroll() {
	if (!window.addEventListener) { window.attachEvent('onDOMMouseScroll', wheel, false);}
	else { window.addEventListener('DOMMouseScroll', wheel, false);}
	window.onmousewheel = document.onmousewheel = wheel;
	document.onkeydown = keydown;
}

function enable_scroll() {
	if (!window.removeEventListener) {	window.detachEvent('onDOMMouseScroll', wheel); }
	else {window.removeEventListener('DOMMouseScroll', wheel, false);}
	window.onmousewheel = document.onmousewheel = document.onkeydown = null;  
}