div模拟滚动条效果示例代码_javascript技巧-js教程-PHP中文网

复制代码 代码如下: * { margin: 0; padding: 0; } { height: 1000px; } #mainBox { width: 250px; height: 500px; border: 1px #bbb solid; position: relative; overflow: hidden; margin: 50px auto; } #content { height:1000px; position: absolute; left: 0; top: 0; } .scrollDiv { width: 6px; position: absolute; top: 0; background: #666; border-radius: 10px; } /* 章节类别 */ .m-catr{padding:15px 0 10px 12px;*padding:15px 0 10px 14px;} .m-catr .tte{float:left; line-height:35px; text-align:left;font-size:14px; font-weight:bold; color:#5b98db;} #content dl{width:225px; float:left; margin-top:10px;} #content dl dt, .m-catr dl dd{float:left;width:100%; line-height:25px; text-align:left; color:#444;} #content dl dt{font-weight:bold;} #content dl dd{margin-left:12px;} 章节类别 第一单元科学是系统化了的知识 1、千篇一律与千变万化 2、双语言时代 3、人们如何做出决策 4、培养独立工作和独立思考的人 第二单元科学是系统化了的知识 1、千篇一律与千变万化 2、双语言时代 3、人们如何做出决策 4、培养独立工作和独立思考的人 第三单元科学是系统化了的知识 1、千篇一律与千变万化 2、双语言时代 3、人们如何做出决策 4、培养独立工作和独立思考的人 第四单元科学是系统化了的知识 1、千篇一律与千变万化 2、双语言时代 3、人们如何做出决策 4、培养独立工作和独立思考的人 第五单元科学是系统化了的知识 1、千篇一律与千变万化 2、双语言时代 3、人们如何做出决策 4、培养独立工作和独立思考的人 var doc = document; var _wheelData = -1; var mainBox = doc.getElementById('mainBox'); function bind(obj, type, handler) { var node = typeof obj == "string" ? $(obj) : obj; if (node.addEventListener) { node.addEventListener(type, handler, false); } else if (node.attachEvent) { node.attachEvent('on' + type, handler); } else { node['on' + type] = handler; } } function mouseWheel(obj, handler) { var node = typeof obj == "string" ? $(obj) : obj; bind(node, 'mousewheel', function (event) { var data = -getWheelData(event); handler(data); if (document.all) { window.event.returnValue = false; } else { event.preventDefault(); } }); //火狐 bind(node, 'DOMMouseScroll', function (event) { var data = getWheelData(event); handler(data); event.preventDefault(); }); function getWheelData(event) { var e = event || window.event; return e.wheelDelta ? e.wheelDelta : e.detail * 40; } } function addScroll() { this.init.apply(this, arguments); } addScroll.prototype = { init: function (mainBox, contentBox, className) { var mainBox = doc.getElementById(mainBox); var contentBox = doc.getElementById(contentBox); var scrollDiv = this._createScroll(mainBox, className); this._resizeScorll(scrollDiv, mainBox, contentBox); this._tragScroll(scrollDiv, mainBox, contentBox); this._wheelChange(scrollDiv, mainBox, contentBox); this._clickScroll(scrollDiv, mainBox, contentBox); }, //创建滚动条 _createScroll: function (mainBox, className) { var _scrollBox = doc.createElement('div'); _scrollBox.setAttribute("id", "scrollBox"); var _scroll = doc.createElement('div'); var span = doc.createElement('span'); _scrollBox.appendChild(_scroll); _scroll.appendChild(span); _scroll.className = className; mainBox.appendChild(_scrollBox); return _scroll; }, //调整滚动条 _resizeScorll: function (element, mainBox, contentBox) { var p = element.parentNode; var conHeight = contentBox.offsetHeight; var _width = mainBox.clientWidth; var _height = mainBox.clientHeight; var _scrollWidth = element.offsetWidth; var _left = _width - _scrollWidth; p.style.width = _scrollWidth + "px"; p.style.height = _height + "px"; p.style.left = _left + "px"; p.style.position = "absolute"; p.style.background = "#ccc"; contentBox.style.width = (mainBox.offsetWidth - _scrollWidth) + "px"; var _scrollHeight = parseInt(_height * (_height / conHeight)); if (_scrollHeight >= mainBox.clientHeight) { element.parentNode.style.display = "none"; } element.style.height = _scrollHeight + "px"; }, //拖动滚动条 _tragScroll: function (element, mainBox, contentBox) { var mainHeight = mainBox.clientHeight; element.onmousedown = function (event) { var _this = this; var _scrollTop = element.offsetTop; var e = event || window.event; var top = e.clientY; //this.onmousemove=scrollGo; document.onmousemove = scrollGo; document.onmouseup = function (event) { this.onmousemove = null; } function scrollGo(event) { var e = event || window.event; var _top = e.clientY; var _t = _top - top + _scrollTop; if (_t > (mainHeight - element.offsetHeight)) { _t = mainHeight - element.offsetHeight; } if (_t _t = 0; } element.style.top = _t + "px"; contentBox.style.top = -_t * (contentBox.offsetHeight / mainBox.offsetHeight) + "px"; _wheelData = _t; } } element.onmouseover = function () { this.style.background = "#444"; } element.onmouseout = function () { this.style.background = "#666"; } }, //鼠标滚轮滚动，滚动条滚动 _wheelChange: function (element, mainBox, contentBox) { var node = typeof mainBox == "string" ? $(mainBox) : mainBox; var flag = 0, rate = 0, wheelFlag = 0; if (node) { mouseWheel(node, function (data) { wheelFlag += data; if (_wheelData >= 0) { flag = _wheelData; element.style.top = flag + "px"; wheelFlag = _wheelData * 12; _wheelData = -1; } else { flag = wheelFlag / 12; } if (flag flag = 0; wheelFlag = 0; } if (flag >= (mainBox.offsetHeight - element.offsetHeight)) { flag = (mainBox.clientHeight - element.offsetHeight); wheelFlag = (mainBox.clientHeight - element.offsetHeight) * 12; } element.style.top = flag + "px"; contentBox.style.top = -flag * (contentBox.offsetHeight / mainBox.offsetHeight) + "px"; }); } }, _clickScroll: function (element, mainBox, contentBox) { var p = element.parentNode; p.onclick = function (event) { var e = event || window.event; var t = e.target || e.srcElement; var sTop = document.documentElement.scrollTop > 0 ? document.documentElement.scrollTop : document.body.scrollTop; var top = mainBox.offsetTop; var _top = e.clientY + sTop - top - element.offsetHeight / 2; if (_top _top = 0; } if (_top >= (mainBox.clientHeight - element.offsetHeight)) { _top = mainBox.clientHeight - element.offsetHeight; } if (t != element) { element.style.top = _top + "px"; contentBox.style.top = -_top * (contentBox.offsetHeight / mainBox.offsetHeight) + "px"; _wheelData = _top; } } } } new addScroll('mainBox', 'content', 'scrollDiv'); $(function () { $("#scrollBox").hide(); $("#mainBox").mouseover(function () { $("#scrollBox").show(); }).mouseout(function () { $("#scrollBox").hide(); }); });

div模拟滚动条效果示例代码_javascript技巧

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