Javascript脚本购物车示例：[4]图片弹性放大

来源：互联网 2023-03-17 00:48:02 417

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。

工具/原料

txt文本文档或者 HTML文档/

方法/步骤

在桌机上新建文本文档，命名为晓博JavaScript特效测试.txt，在文本文档里中入HTML文档的基本元素如下，并保存。

html>

head>

title>晓博JavaScript特效测试/title>

/head>

body>

div id="zy">

div id="login">/div>

div id="daohang">

ul>

li>a href="index.html">首页/a>/li>

li>a href="jianjie.html">七夕简介/a>/li>

li>a href="#">七夕节传说/a>/li>

li>a href="#">七夕节习俗/a>/li>

li>a href="#">诗词& 歌谣/a>/li>

li>a href="#">七夕节寄语/a>/li>

/ul>

/div>

/body>

/html>

Javascript脚本购物车示例：[4]图片弹性放大

第一步：把如下代码加入head>区域中

style type="text/css">

html {

overflow: hidden;

}

body {

margin: 0px;

padding: 0px;

background: #000;

position: absolute;

cursor: crosshair;

}

#diapoContainer {

position: absolute;

left: 10%;

top: 10%;

width: 80%;

height: 80%;

background: #222;

overflow: hidden;

}

.imgDC {

position: absolute;

cursor: pointer;

border: #000 solid 2px;

filter: alpha(opacity=90);

opacity: 0.9;

visibility: hidden;

}

.spaDC {

position: absolute;

filter: alpha(opacity=20);

opacity: 0.2;

background: #000;

visibility: hidden;

}

.imgsrc {

position: absolute;

width: 120px;

height: 67px;

visibility: hidden;

margin: 4%;

}

#bkgcaption {

position: absolute;

bottom: 0px;

left: 0px;

width: 100%;

height: 6%;

background:#1a1a1a;

}

#caption {

position: absolute;

font-family: arial, helvetica, verdana, sans-serif;

white-space: nowrap;

color: #fff;

bottom: 0px;

width: 100%;

left: -10000px;

text-align: center;

}/style>

script type="text/javascript">

var xm;

var ym;

document.onmousemove = function(e){

if(window.event) e=window.event;

xm = (e.x || e.clientX);

ym = (e.y || e.clientY);

}

function resize() {

if(diapo)diapo.resize();

}

onresize = resize;

setOpacity = function(o, alpha){

if(o.filters)o.filters.alpha.opacity = alpha * 100; else o.style.opacity = alpha;

}

diapo = {

O : [],

DC : 0,

img : 0,

txt : 0,

N : 0,

xm : 0,

ym : 0,

nx : 0,

ny : 0,

nw : 0,

nh : 0,

rs : 0,

rsB : 0,

zo : 0,

tx_pos : 0,

tx_var : 0,

tx_target : 0,

attraction : 2,

acceleration : .9,

dampening : .1,

zoomOver : 2,

zoomClick : 6,

transparency : .8,

font_size: 18,

resize : function(){

with(this){

nx = DC.offsetLeft;

ny = DC.offsetTop;

nw = DC.offsetWidth;

nh = DC.offsetHeight;

txt.style.fontSize = Math.round(nh / font_size) "px";

if(Math.abs(rs-rsB)100) for(var i=0; iN; i ) O[i].resize();

rsB = rs;

}

CDiapo : function(o){

this.o = o;

this.x_pos = this.y_pos = 0;

this.x_origin = this.y_origin = 0;

this.x_var = this.y_var = 0;

this.x_target = this.y_target = 0;

this.w_pos = this.h_pos = 0;

this.w_origin = this.h_origin = 0;

this.w_var = this.h_var = 0;

this.w_target = this.h_target = 0;

this.over = false;

this.click = false;

this.spa = document.createElement("span");

this.spa.className = "spaDC";

diapo.DC.appendChild(this.spa);

this.img = document.createElement("img");

this.img.className = "imgDC";

this.img.src = o.src;

this.img.O = this;

diapo.DC.appendChild(this.img);

setOpacity(this.img, diapo.transparency);

this.img.onselectstart = new Function("return false;");

this.img.ondrag = new Function("return false;");

this.img.onmouseover = function(){

diapo.tx_target=0;

diapo.txt.innerHTML=this.O.o.alt;

this.O.over=true;

setOpacity(this,this.O.click?diapo.transparency:1);

}

this.img.onmouseout = function(){

diapo.tx_target=-diapo.nw;

this.O.over=false;

setOpacity(this,diapo.transparency);

}

this.img.onclick = function() {

if(!this.O.click){

if(diapo.zo && diapo.zo != this) diapo.zo.onclick();

this.O.click = true;

this.O.x_origin = (diapo.nw - (this.O.w_origin *

diapo.zoomClick)) / 2;

this.O.y_origin = (diapo.nh - (this.O.h_origin *

diapo.zoomClick)) / 2;

diapo.zo = this;

setOpacity(this,diapo.transparency);

} else {

this.O.click = false;

this.O.over = false;

this.O.resize();

diapo.zo = 0;

}

this.resize = function (){

with (this) {

x_origin = o.offsetLeft;

y_origin = o.offsetTop;

w_origin = o.offsetWidth;

h_origin = o.offsetHeight;

}}

this.position = function (){

with (this) {

w_target = w_origin;

h_target = h_origin;

if(over){

w_target = w_origin * diapo.zoomOver;

h_target = h_origin * diapo.zoomOver;

x_target = diapo.xm - w_pos / 2 - (diapo.xm - (x_origin w_pos / 2)) / (diapo.attraction*(click?10:1));

y_target = diapo.ym - h_pos / 2 - (diapo.ym - (y_origin h_pos / 2)) / (diapo.attraction*(click?10:1));

} else {

x_target = x_origin;

y_target = y_origin;}

if(click){

w_target = w_origin * diapo.zoomClick;

h_target = h_origin * diapo.zoomClick;

}x_pos = x_var = x_var * diapo.acceleration (x_target - x_pos) * diapo.dampening;y_pos = y_var = y_var * diapo.acceleration (y_target -

y_pos) * diapo.dampening;w_pos = w_var = w_var * (diapo.acceleration * .5)

(w_target - w_pos) * (diapo.dampening * .5);

h_pos = h_var = h_var * (diapo.acceleration * .5) (h_target - h_pos) * (diapo.dampening * .5);

diapo.rs = (Math.abs(x_var) Math.abs(y_var));

with(img.style){

left = Math.round(x_pos) "px";

top = Math.round(y_pos) "px";

width = Math.round(Math.max(0, w_pos)) "px";

height = Math.round(Math.max(0, h_pos)) "px";

zIndex = Math.round(w_pos);

}

with(spa.style){

left = Math.round(x_pos w_pos * .1) "px";

top = Math.round(y_pos h_pos * .1) "px";

width = Math.round(Math.max(0, w_pos * 1.1)) "px";

height = Math.round(Math.max(0, h_pos * 1.1)) "px";

zIndex = Math.round(w_pos);

}}}},

run : function(){

diapo.xm = xm - diapo.nx;

diapo.ym = ym - diapo.ny;

diapo.tx_pos = diapo.tx_var = diapo.tx_var * .9 (diapo.tx_target -

diapo.tx_pos) * .02;

diapo.txt.style.left = Math.round(diapo.tx_pos) "px";

for(var i in diapo.O) diapo.O[i].position();

setTimeout("diapo.run();", 16);

images_load : function(){

var M = 0;

for(var i=0; idiapo.N; i ) {

if(diapo.img[i].complete) {

diapo.img[i].style.position = "relative";

diapo.O[i].img.style.visibility = "visible";

diapo.O[i].spa.style.visibility = "visible";

M ;

}

resize();

}

if(Mdiapo.N) setTimeout("diapo.images_load();", 128);

init : function() {

diapo.DC = document.getElementById("diapoContainer");

diapo.img = diapo.DC.getElementsByTagName("img");

diapo.txt = document.getElementById("caption");

diapo.N = diapo.img.length;

for(i=0; idiapo.N; i ) diapo.O.push(new diapo.CDiapo(diapo.img[i]));

diapo.resize();

diapo.tx_pos = -diapo.nw;

diapo.tx_target = -diapo.nw;

diapo.images_load();

diapo.run();

}

/script>

第二步：把如下代码加入body>区域中,并重名文档为HTML文件

div id="diapoContainer">

img src="wall1.jpg">

img src="wall2.jpg">

img src="wall3.jpg">

div id="bkgcaption">/div>

div id="caption">/div>

/div>

script type="text/javascript">

function dom_onload() {

if(document.getElementById("diapoContainer")) diapo.init(); else setTimeout("dom_onload();", 128);

}

dom_onload();

/script>

/div>

3相关内容非法爬取自百度经验

用IE浏览器打开晓博JavaScript特效测试.html文件，可以看到生成弹性透明的图片放大特效，如下图

Javascript脚本购物车示例：[4]图片弹性放大

图像圆角化|下一篇：

以上方法由办公区教程网编辑摘抄自百度经验可供大家参考！

标签： JAVASCRIPT

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Javascript脚本购物车示例：[4]图片弹性放大

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