JS禁用和启用鼠标滚轮滚动事件

// 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.addEventListener('DOMMouseScroll', wheel, false);
}
window.onmousewheel = document.onmousewheel = wheel;
document.onkeydown = keydown;
} function enable_scroll() {
if (window.removeEventListener) {
window.removeEventListener('DOMMouseScroll', wheel, false);
}
window.onmousewheel = document.onmousewheel = document.onkeydown = null;
}

  

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