发布于 2017-01-11 16:46:19 | 22 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。


图片翻书效果想必大家都有见过吧,在本文将为大家介绍下使用js是如何实现的,具体的代码如下,感兴趣的朋友可以参考下
picture.html
 
<html xmlns="http://www.w3.org/1999/xhtml"> 
<head> 
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> 
<title>JS实现图片翻书效果</title> 
<META http-equiv=imagetoolbar content=no> 
<link rel="stylesheet" type="text/css" href="picture.css"/> 
<script type="text/javascript" src="picture.js"></script> 
<BODY> 

<DIV id=center> 
<!--图片位置--> 
<DIV id=DHTMLBOOK> 
<SPAN class=page onMouseDown="return false;" ondblclick=TPL(); onclick=TPL();><IMG class=img></SPAN> 
<SPAN class="page right" onmousedown="return false;" ondblclick=TPR(); onclick=TPR();><IMG class=img style="LEFT: -100%"></SPAN> 
<SPAN class="page turn" onMouseDown="return false;" ondblclick=TPL(); onclick=TPL();><IMG class=img style="FILTER: alpha(); opacity: 1"></SPAN> 
<SPAN class="page turn right" onmousedown="return false;" ondblclick=TPR(); onclick=TPR();><IMG class=img style="FILTER: alpha(); LEFT: -100%; opacity: 1"></SPAN> 
<!--文字位置--> 
<DIV id=TXTBOX></DIV> 
</DIV> 
</DIV> 

<DIV id=imgsrc style="VISIBILITY: hidden"> 
<IMG alt="In the early morning he departed." src="babi/86d6277f9e2f0708ce332da4e924b899a901f264.jpg"> 
<IMG alt="Believing she had dreamed of the roar of his bike," src="babi/c4aaee1ejw1e3jb8r868vj.jpg"> 
<IMG alt="she woke up to the sunshine in her eyelids." src="babi/7-121205155537-52.jpg"> 
<IMG alt="she woke up to the sunshine in her eyelids." src="babi/c4aaee1ejw1e3jb91py0fj.jpg"> 
<IMG alt="she woke up to the sunshine in her eyelids." src="babi/c4aaee1ejw1e3jb94nx7bj.jpg"> 
</DIV> 
</BODY></HTML> 

picture.css
 
#center { 
LEFT: 50%; POSITION: absolute; TOP: 50% 
} 
#DHTMLBOOK { 
BACKGROUND: #000; LEFT: -210px; VISIBILITY: hidden; WIDTH: 210px; POSITION: relative; TOP: -160px; HEIGHT: 160px 
} 
#TXTBOX { 
FONT-SIZE: 0.8em; WIDTH: 210px; COLOR: #aba193; FONT-FAMILY: verdana; POSITION: absolute; TOP: 160px; TEXT-ALIGN: center 
} 
.page { 
OVERFLOW: hidden; BORDER-LEFT: #000000 1px solid; WIDTH: 50%; CURSOR: pointer; POSITION: absolute; HEIGHT: 100% 
} 
.right { 
BORDER-RIGHT: #000000 1px solid; LEFT: 50% 
} 
.turn { 
BACKGROUND: #000000 
} 
.img { 
WIDTH: 200%; POSITION: absolute; HEIGHT: 100% 
} 

picture.js
 
document.onselectstart = function () { return false; } 

var nI = 0; 
var kI = 0; 
var run = false; 

function setOpacity(obj,o) { 
if (o<0) o=0; else if (o>100) o = 100; 
if (obj.filters)obj.filters.alpha.opacity=o; else obj.style.opacity = o/100; 
} 
function TPR__(p) { 
P1.style.left = 50-(2.5*p)+"%"; 
P1.style.width = (2.5*p)+"%"; 
setOpacity(P1i, .5*p*p); 
if (p == 20) run = false; 
} 
function TPR_(p) { 
P2.style.width = 50-(2.5*p)+"%"; 
setOpacity(P2i, 100-.5*(p*p)); 
if (p == 20) { 
P2i.src = IMGSRC[kI].src; 
setOpacity(P2i, 100); 
P2.style.width = "50%"; 
for(var i=1; i<=20; i++) setTimeout("TPR__("+i+")", i*32); 
} 
} 
function TPR() { 
if (!run) { 
run = true; 
P01i.src = IMGSRC[kI].src; 
P1.style.width = 0; 
kI++; 
if (kI>=nI) kI = 0; 
titLe(kI); 
P02i.src = IMGSRC[kI].src; 
P1i.src = IMGSRC[kI].src; 
for (var i=1; i<=20; i++) setTimeout("TPR_("+i+")", i*32); 
} else setTimeout("TPR()", 100); 
} 

function TPL__(p) { 
P2.style.width = (2.5*p)+"%"; 
setOpacity(P2i, .5*p*p); 
if (p == 20) run = false; 
} 
function TPL_(p) { 
P1.style.left = (2.5*p)+"%"; 
P1.style.width = 40+(10-2.5*p)+"%"; 
setOpacity(P1i, 100-.5*(p*p)); 
if (p == 20) { 
P1i.src = IMGSRC[kI].src; 
setOpacity(P1i, 100); 
P1.style.left = 0; 
P1.style.width = "50%"; 
for(var i=1; i<=20; i++) setTimeout("TPL__("+i+")", i*32); 
} 
} 
function TPL() { 
if (!run) { 
run = true; 
P02i.src = IMGSRC[kI].src; 
P2.style.width = 0; 
kI--; 
if (kI < 0) kI = nI-1; 
titLe(kI); 
P01i.src = IMGSRC[kI].src; 
P2i.src = IMGSRC[kI].src; 
for(var i=1; i<=20; i++) setTimeout("TPL_("+i+")", i*32); 
} else setTimeout("TPL()", 100); 
} 
function titLe(p) { 
document.getElementById("TXTBOX").innerHTML = IMGSRC[p].alt; 
} 
onload = function() { 
IMGSRC = document.getElementById("imgsrc").getElementsByTagName("img"); 
DB = document.getElementById("DHTMLBOOK"); 
P01 = DB.getElementsByTagName("span")[0]; 
P01i = P01.getElementsByTagName("img")[0]; 
P02 = DB.getElementsByTagName("span")[1]; 
P02i = P02.getElementsByTagName("img")[0]; 
P1 = DB.getElementsByTagName("span")[2]; 
P1i = P1.getElementsByTagName("img")[0]; 
P2 = DB.getElementsByTagName("span")[3]; 
P2i = P2.getElementsByTagName("img")[0]; 
nI = IMGSRC.length; 
P1i.src = IMGSRC[kI].src; 
P2i.src = IMGSRC[kI].src; 
titLe(kI); 
DB.style.visibility = "visible"; 
} 


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