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。