发布于 2017-01-13 07:46:43 | 156 次阅读 | 评论: 0 | 来源: 网友投递

这里有新鲜出炉的Javascript教程,程序狗速度看过来!

JavaScript客户端脚本语言

Javascript 是一种由Netscape的LiveScript发展而来的原型化继承的基于对象的动态类型的区分大小写的客户端脚本语言,主要目的是为了解决服务器端语言,比如Perl,遗留的速度问题,为客户提供更流畅的浏览效果。


滚动条想必大家都见过吧,在本文将使用div来模拟滚动条的效果,具体实现如下,感兴趣的朋友可以参考下
 
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="html.aspx.cs" Inherits="WebApplication1.html" %> 

<!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 runat="server"> 
<style type="text/css"> 
* 
{ 
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;} 
</style> 
<script src="Scripts/jquery-1.7.2.min.js" type="text/javascript"></script> 
<title></title> 
</head> 
<body> 
<!-- 章节类别 --> 
<div class="m-catr f-cb"> 
<div class="tte"> 
章节类别</div> 
<div id="mainBox"> 
<div id="content"> 
<dl data-type="menu"> 
<dt>第一单元科学是系统化了的知识</dt> 
<dd> 
1、千篇一律与千变万化</dd> 
<dd> 
2、双语言时代</dd> 
<dd> 
3、人们如何做出决策</dd> 
<dd> 
4、培养独立工作和独立思考的人</dd> 
</dl> 
<dl data-type="menu"> 
<dt>第二单元科学是系统化了的知识</dt> 
<dd> 
1、千篇一律与千变万化</dd> 
<dd> 
2、双语言时代</dd> 
<dd> 
3、人们如何做出决策</dd> 
<dd> 
4、培养独立工作和独立思考的人</dd> 
</dl> 
<dl data-type="menu"> 
<dt>第三单元科学是系统化了的知识</dt> 
<dd> 
1、千篇一律与千变万化</dd> 
<dd> 
2、双语言时代</dd> 
<dd> 
3、人们如何做出决策</dd> 
<dd> 
4、培养独立工作和独立思考的人</dd> 
</dl> 
<dl data-type="menu"> 
<dt>第四单元科学是系统化了的知识</dt> 
<dd> 
1、千篇一律与千变万化</dd> 
<dd> 
2、双语言时代</dd> 
<dd> 
3、人们如何做出决策</dd> 
<dd> 
4、培养独立工作和独立思考的人</dd> 
</dl> 
<dl data-type="menu"> 
<dt>第五单元科学是系统化了的知识</dt> 
<dd> 
1、千篇一律与千变万化</dd> 
<dd> 
2、双语言时代</dd> 
<dd> 
3、人们如何做出决策</dd> 
<dd> 
4、培养独立工作和独立思考的人</dd> 
</dl> 
</div> 
</div> 
</div> 
<!-- /章节类别 --> 
<script type="text/javascript"> 
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 <= 0) { 
_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 <= 0) { 
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 <= 0) { 
_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(); 

}); 

}); 

</script> 
</body> 
</html> 


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