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js 禁止|阻止滚动条滚动

2015-12-15 17:44 585 查看

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>js javascript禁止滚动条滚动事件</title>
<script type="text/javascript" src="control_scroll.js" ></script>
</head>

<body>
<script>
// 用于通过ID获取对象
function $(x) { return document.getElementById(x); };

//添加事件
var addEvent = (function () {
if (document.addEventListener) {
return function (el, type, fn, capture) { el.addEventListener(type, fn, capture); };
} else {
return function (el, type, fn, capture) { el.attachEvent('on' + type, function () { return fn.call(el, window.event); }, capture); }
}
})();
//添加鼠标滚动轮事件
function addEventWheel(obj, fn ,useCapture){
var mousewheelevt=(/Firefox/i.test(navigator.userAgent))?"DOMMouseScroll": "mousewheel";//FF doesn't recognize mousewheel as of FF3.x
addEvent(obj, mousewheelevt, handler, useCapture);
//初始化处理回调函数
function handler(event) {
var delta = 0;
var event = window.event ||event ;
var delta = event.detail ?-event.detail/3 : event.wheelDelta/120;
if(event.preventDefault){ event.preventDefault(); }else{ event.returnValue = false; }//禁止默认事件
return fn.apply(obj, [event, delta]);//event事件对象 delta 滚动值
}
}

window.onload = function() {
// 创建换行，让body足够高
for (i = 0; i < 500; i++) {
var x = document.createElement('div');
x.innerHTML = "换行<br/>";
document.body.appendChild(x);
}
//添加鼠标滚动轮事件随着滚动而改变值
addEventWheel($("wrap"),function(e,delta){ $("he").innerHTML = parseInt($("he").innerHTML) + delta; },false);
}
</script>
<div id="wrap" style="position:absolute;left:100px;top:0px;background:#ccc;width:300px;height:300px;">
<h1 id="he" style="text-align:center;width:100%;color:#f00;">0</h1>
鼠标移动这里，转动滚轮，随你而改变！
</div>
</body>
</html>

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