使用css代码可以禁止网页滚动，但是会使浏览器窗口的滚动条消失。而js代码则可以让页面禁止滚动的同时，保留滚动条的显示状态，而且滚动条的位置不变。
javascript代码
var keys = { 37: 1, 38: 1, 39: 1, 40: 1 };
function preventDefault(e) {
e = e || window.event;
if (e.preventDefault)
e.preventDefault();
e.returnValue = false;
}
function preventDefaultForScrollKeys(e) {
if (keys[e.keyCode]) {
preventDefault(e);
return false;
}
}
var oldonwheel, oldonmousewheel1, oldonmousewheel2, oldontouchmove, oldonkeydown
, isDisabled;
function disableScroll() {
if (window.addEventListener) // older FF
window.addEventListener('DOMMouseScroll', preventDefault, false);
oldonwheel = window.onwheel;
window.onwheel = preventDefault; // modern standard
oldonmousewheel1 = window.onmousewheel;
window.onmousewheel = preventDefault; // older browsers, IE
oldonmousewheel2 = document.onmousewheel;
document.onmousewheel = preventDefault; // older browsers, IE
oldontouchmove = window.ontouchmove;
window.ontouchmove = preventDefault; // mobile
oldonkeydown = document.onkeydown;
document.onkeydown = preventDefaultForScrollKeys;
isDisabled = true;
}
function enableScroll() {
if (!isDisabled) return;
if (window.removeEventListener)
window.removeEventListener('DOMMouseScroll', preventDefault, false);
window.onwheel = oldonwheel; // modern standard
window.onmousewheel = oldonmousewheel1; // older browsers, IE
document.onmousewheel = oldonmousewheel2; // older browsers, IE
window.ontouchmove = oldontouchmove; // mobile
document.onkeydown = oldonkeydown;
isDisabled = false;
}
window.scrollHanlder = {
disableScroll: disableScroll,
enableScroll: enableScroll
};
调用代码
禁止滚动时，调用：
disableScroll()
恢复滚动时，调用函数：
enableScroll()
存在的问题
会导致弹窗的滚动也禁止，需要拖动滚动条；
测试后好像不兼容Chrome浏览器。
