js图片秀代码（js操作图片）

本文目录一览：

1、我想把一个图片代码写到js了里面，然后调用这个js，就可以直接显示图片在网页上，怎么写？
2、JavaScript 的网页图片切换代码
3、Js获取图片原始宽高的实现代码

我想把一个图片代码写到js了里面，然后调用这个js，就可以直接显示图片在网页上，怎么写？

这个实现一般有两用方式

1.用js定义一个字符串变量，把图片的字符串写进去，然后div.innerhtml把这个字符串加进去。

2.用类似jquery的js插件，也是先定义图片字符串变量，然后div.append这个字符串就好了。

JavaScript 的网页图片切换代码

!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" ""

html xmlns=""

head

meta http-equiv="Content-Type" content="text/html; charset=gb2312"

title网页特效首页图片切换/title

style type="text/css"

/* Reset style */

* { margin:0; padding:0; word-break:break-all; }

body {

background:#fff;

color:#000000;

font:12px/1.6em Helvetica, Arial, sans-serif;

margin-left: 0px;

margin-top: 0px;

margin-right: 0px;

margin-bottom: 0px;

}

h1, h2, h3, h4, h5, h6 { font-size:1em; }

a { color:#0287CA; text-decoration:none; }

a:hover { text-decoration:underline; }

ul, li { list-style:none; }

fieldset, img { border:none; }

legend { display:none; }

em, strong, cite, th { font-style:normal; font-weight:normal; }

input, textarea, select, button { font:12px Helvetica, Arial, sans-serif; }

table { border-collapse:collapse; }

html { overflow:-moz-scrollbars-vertical; } /*Always show Firefox scrollbar*/

/* iFocus style */

#ifocus { width:650px; height:245px; margin:0px; border:1px solid #DEDEDE; background:#F8F8F8; }

#ifocus_pic { display:inline; position:relative; float:left; width:540px; height:225px; overflow:hidden; margin:10px 0 0 10px; }

#ifocus_piclist { position:absolute; }

#ifocus_piclist li { width:550px; height:225px; overflow:hidden; }

#ifocus_piclist img { width:550px; height:225px; }

#ifocus_btn { display:inline; float:right; width:91px; margin:9px 9px 0 0; }

#ifocus_btn li { width:91px; height:57px; cursor:pointer; opacity:0.5; -moz-opacity:0.5; filter:alpha(opacity=50); }

#ifocus_btn img { width:75px; height:45px; margin:7px 0 0 11px; }

#ifocus_btn .current { background: url(img/ifocus_btn_bg.gif) no-repeat; opacity:1; -moz-opacity:1; filter:alpha(opacity=100); }

#ifocus_opdiv { position:absolute; left:0; bottom:0; width:545px; height:35px; background:#000; opacity:0.5; -moz-opacity:0.5; filter:alpha(opacity=50); }

#ifocus_tx { position:absolute; left:8px; bottom:8px; color:#FFF; }

#ifocus_tx .normal { display:none; }

/style

script type="text/javascript"

function $(id) { return document.getElementById(id); }

function addLoadEvent(func){

var oldonload = window.onload;

if (typeof window.onload != 'function') {

window.onload = func;

} else {

window.onload = function(){

oldonload();

func();

}

function moveElement(elementID,final_x,final_y,interval) {

if (!document.getElementById) return false;

if (!document.getElementById(elementID)) return false;

var elem = document.getElementById(elementID);

if (elem.movement) {

clearTimeout(elem.movement);

}

if (!elem.style.left) {

elem.style.left = "0px";

}

if (!elem.style.top) {

elem.style.top = "0px";

}

var xpos = parseInt(elem.style.left);

var ypos = parseInt(elem.style.top);

if (xpos == final_x ypos == final_y) {

return true;

}

if (xpos final_x) {

var dist = Math.ceil((final_x - xpos)/10);

xpos = xpos + dist;

}

if (xpos final_x) {

var dist = Math.ceil((xpos - final_x)/10);

xpos = xpos - dist;

}

if (ypos final_y) {

var dist = Math.ceil((final_y - ypos)/10);

ypos = ypos + dist;

}

if (ypos final_y) {

var dist = Math.ceil((ypos - final_y)/10);

ypos = ypos - dist;

}

elem.style.left = xpos + "px";

elem.style.top = ypos + "px";

var repeat = "moveElement('"+elementID+"',"+final_x+","+final_y+","+interval+")";

elem.movement = setTimeout(repeat,interval);

}

function classNormal(iFocusBtnID,iFocusTxID){

var iFocusBtns= $(iFocusBtnID).getElementsByTagName('li');

var iFocusTxs = $(iFocusTxID).getElementsByTagName('li');

for(var i=0; iiFocusBtns.length; i++) {

iFocusBtns[i].className='normal';

iFocusTxs[i].className='normal';

}

function classCurrent(iFocusBtnID,iFocusTxID,n){

var iFocusBtns= $(iFocusBtnID).getElementsByTagName('li');

var iFocusTxs = $(iFocusTxID).getElementsByTagName('li');

iFocusBtns[n].className='current';

iFocusTxs[n].className='current';

}

function iFocusChange() {

if(!$('ifocus')) return false;

$('ifocus').onmouseover = function(){atuokey = true};

$('ifocus').onmouseout = function(){atuokey = false};

var iFocusBtns = $('ifocus_btn').getElementsByTagName('li');

var listLength = iFocusBtns.length;

iFocusBtns[0].onmouseover = function() {

moveElement('ifocus_piclist',0,0,5);

classNormal('ifocus_btn','ifocus_tx');

classCurrent('ifocus_btn','ifocus_tx',0);

}

if (listLength=2) {

iFocusBtns[1].onmouseover = function() {

moveElement('ifocus_piclist',0,-225,5);

classNormal('ifocus_btn','ifocus_tx');

classCurrent('ifocus_btn','ifocus_tx',1);

}

if (listLength=3) {

iFocusBtns[2].onmouseover = function() {

moveElement('ifocus_piclist',0,-450,5);

classNormal('ifocus_btn','ifocus_tx');

classCurrent('ifocus_btn','ifocus_tx',2);

}

if (listLength=4) {

iFocusBtns[3].onmouseover = function() {

moveElement('ifocus_piclist',0,-675,5);

classNormal('ifocus_btn','ifocus_tx');

classCurrent('ifocus_btn','ifocus_tx',3);

}

setInterval('autoiFocus()',3500);

var atuokey = false;

function autoiFocus() {

if(!$('ifocus')) return false;

if(atuokey) return false;

var focusBtnList = $('ifocus_btn').getElementsByTagName('li');

var listLength = focusBtnList.length;

for(var i=0; ilistLength; i++) {

if (focusBtnList[i].className == 'current') var currentNum = i;

}

if (currentNum==0listLength!=1 ){

moveElement('ifocus_piclist',0,-225,5);

classNormal('ifocus_btn','ifocus_tx');

classCurrent('ifocus_btn','ifocus_tx',1);

}

if (currentNum==1listLength!=2 ){

moveElement('ifocus_piclist',0,-450,5);

classNormal('ifocus_btn','ifocus_tx');

classCurrent('ifocus_btn','ifocus_tx',2);

}

if (currentNum==2listLength!=3 ){

moveElement('ifocus_piclist',0,-675,5);

classNormal('ifocus_btn','ifocus_tx');

classCurrent('ifocus_btn','ifocus_tx',3);

}

if (currentNum==3 ){

moveElement('ifocus_piclist',0,0,5);

classNormal('ifocus_btn','ifocus_tx');

classCurrent('ifocus_btn','ifocus_tx',0);

}

if (currentNum==1listLength==2 ){

moveElement('ifocus_piclist',0,0,5);

classNormal('ifocus_btn','ifocus_tx');

classCurrent('ifocus_btn','ifocus_tx',0);

}

if (currentNum==2listLength==3 ){

moveElement('ifocus_piclist',0,0,5);

classNormal('ifocus_btn','ifocus_tx');

classCurrent('ifocus_btn','ifocus_tx',0);

}

addLoadEvent(iFocusChange);

/script

/head

body

br /

div align="center"

div id="ifocus"

div id="ifocus_pic"

div id="ifocus_piclist" style="left:0; top:0;"

lia href="#" target="_blank"img src="/edu/img/js/200909/1.jpg" alt="武林三国" border="0" //a/li

lia href="#" target="_blank"img src="/edu/img/js/200909/2.jpg" alt="武林英雄" border="0" //a/li

lia href="#" target="_blank"img src="/edu/img/js/200909/3.jpg" alt="商业大亨" border="0" //a/li

lia href="#" target="_blank"img src="/edu/img/js/200909/4.jpg" alt="帝国远征" border="0" //a/li

/ul

/div

div id="ifocus_opdiv"/div

div id="ifocus_tx"

li class="current"2008年度排名第一的网页游戏/li

li class="normal"2009年最新的网页游戏 /li

li class="normal"商业大亨，挑战亿万富翁/li

li class="normal"一款2009年不得不玩的帝国远征/li

/ul

/div

div id="ifocus_btn"

li class="current"img src="/edu/img/js/200909/s1.jpg" alt="" //li

li class="normal"img src="/edu/img/js/200909/s2.jpg" alt="" //li

li class="normal"img src="/edu/img/js/200909/s3.jpg" alt="" //li

li class="normal"img src="/edu/img/js/200909/s4.jpg" alt="" //li

/ul

/div

/body

/html

自己改图片链接和大小~~

Js获取图片原始宽高的实现代码

如果我们页面看到的图片都是缩略图，那就需要做个图片点击放大效果，那么怎样获取图片的原始宽高呢？方法如下：

//获取图片原始宽度

function

getNaturalWidthAndHeight(img)

{

var

image

new

Image();

image.src

img.src;

return

[image.width,image.height];

}

//点击缩略图弹出层，显示原始图片。

//获取class为tz_main_box下的所有p标签下的图片img

$(".tz_main_box

pimg").each(function

(k,

{

$(this).unbind("click");

//解除绑定，防止弹出多次图片层。

$(this).click(function

()

{

var

img

//图片对象

var

imgArea

getNaturalWidthAndHeight(img);

var

layerWidth

imgArea[0]+

(layerWidth

1080)

{

layerWidth

1080;

}

var

layerHeight

imgArea[1]

(layerHeight

600)

{

layerHeight

600;

}

//layer弹出层插件

layer.open({

type:

title:

false,

closeBtn:

area:

[''+layerWidth+'px',

layerHeight

'px'],

skin:

'layui-layer-nobg',

//没有背景色

shadeClose:

true,

closeBtn:

//显示关闭按钮

content:

"centerimg

src='"

$(this).attr("src")

"'/center"

});

以上这篇Js获取图片原始宽高的实现代码就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持。